Remove the rest of #pragma once in one big CL.

For context see this thread: https://groups.google.com/a/chromium.org/forum/?fromgroups#!topic/chromium-dev/RMcVNGjB4II TBR=thakis,pkasting,jam git-svn-id: svn://svn.chromium.org/chrome/trunk/src@146163 0039d316-1c4b-4281-b951-d872f2087c98
author: ajwong@chromium.org <ajwong@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> 2012-07-11 19:01:43 +0000
committer: ajwong@chromium.org <ajwong@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> 2012-07-11 19:01:43 +0000
commit: 01c86ece0232e9b15bff05f1ee508c7f6bdc2ef0 (patch)
tree: ce78aa58908c7bc64bcb3596bd1298b872b85701 /ui
parent: a19317f99fd8f35cd2bf8ebe3d0f34dc71866574 (diff)
download: chromium_src-01c86ece0232e9b15bff05f1ee508c7f6bdc2ef0.zip
chromium_src-01c86ece0232e9b15bff05f1ee508c7f6bdc2ef0.tar.gz
chromium_src-01c86ece0232e9b15bff05f1ee508c7f6bdc2ef0.tar.bz2
593 files changed, 0 insertions, 593 deletions
diff --git a/ui/app_list/app_list_bubble_border.h b/ui/app_list/app_list_bubble_border.h
index c65298f..3aea452 100644
--- a/ui/app_list/app_list_bubble_border.h
+++ b/ui/app_list/app_list_bubble_border.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_APP_LIST_BUBBLE_BORDER_H_
 #define UI_APP_LIST_APP_LIST_BUBBLE_BORDER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/gfx/shadow_value.h"
diff --git a/ui/app_list/app_list_export.h b/ui/app_list/app_list_export.h
index 66021e9..cb5ece9 100644
--- a/ui/app_list/app_list_export.h
+++ b/ui/app_list/app_list_export.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_APP_LIST_EXPORT_H_
 #define UI_APP_LIST_APP_LIST_EXPORT_H_
-#pragma once
 
 // Defines APP_LIST_EXPORT so that functionality implemented by the app_list
 // module can be exported to consumers.
diff --git a/ui/app_list/app_list_item_model.h b/ui/app_list/app_list_item_model.h
index 3729b95..c117550 100644
--- a/ui/app_list/app_list_item_model.h
+++ b/ui/app_list/app_list_item_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_APP_LIST_ITEM_MODEL_H_
 #define UI_APP_LIST_APP_LIST_ITEM_MODEL_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/app_list/app_list_item_model_observer.h b/ui/app_list/app_list_item_model_observer.h
index 813b6d7..0e5f99d 100644
--- a/ui/app_list/app_list_item_model_observer.h
+++ b/ui/app_list/app_list_item_model_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_APP_LIST_ITEM_MODEL_OBSERVER_H_
 #define UI_APP_LIST_APP_LIST_ITEM_MODEL_OBSERVER_H_
-#pragma once
 
 #include "ui/app_list/app_list_export.h"
 
diff --git a/ui/app_list/app_list_item_view.h b/ui/app_list/app_list_item_view.h
index 6f64bed..d4d11b8 100644
--- a/ui/app_list/app_list_item_view.h
+++ b/ui/app_list/app_list_item_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_APP_LIST_ITEM_VIEW_H_
 #define UI_APP_LIST_APP_LIST_ITEM_VIEW_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/app_list/app_list_model.h b/ui/app_list/app_list_model.h
index 9eae5ba..d0c5923 100644
--- a/ui/app_list/app_list_model.h
+++ b/ui/app_list/app_list_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_APP_LIST_MODEL_H_
 #define UI_APP_LIST_APP_LIST_MODEL_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/app_list/app_list_view.h b/ui/app_list/app_list_view.h
index d2ed6a3..507dd63 100644
--- a/ui/app_list/app_list_view.h
+++ b/ui/app_list/app_list_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_APP_LIST_VIEW_H_
 #define UI_APP_LIST_APP_LIST_VIEW_H_
-#pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/app_list/app_list_export.h"
diff --git a/ui/app_list/app_list_view_delegate.h b/ui/app_list/app_list_view_delegate.h
index 60a0778..159d616 100644
--- a/ui/app_list/app_list_view_delegate.h
+++ b/ui/app_list/app_list_view_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 #define UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
-#pragma once
 
 #include "ui/app_list/app_list_export.h"
 
diff --git a/ui/app_list/apps_grid_view.h b/ui/app_list/apps_grid_view.h
index 4cff9ce..4f4ad46 100644
--- a/ui/app_list/apps_grid_view.h
+++ b/ui/app_list/apps_grid_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_APPS_GRID_VIEW_H_
 #define UI_APP_LIST_APPS_GRID_VIEW_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/app_list/contents_view.h b/ui/app_list/contents_view.h
index 1d5ce4cc..a79e735 100644
--- a/ui/app_list/contents_view.h
+++ b/ui/app_list/contents_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_CONTENTS_VIEW_H_
 #define UI_APP_LIST_CONTENTS_VIEW_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/app_list/drop_shadow_label.h b/ui/app_list/drop_shadow_label.h
index 104cb1a..081368f 100644
--- a/ui/app_list/drop_shadow_label.h
+++ b/ui/app_list/drop_shadow_label.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_DROP_SHADOW_LABEL_H_
 #define UI_APP_LIST_DROP_SHADOW_LABEL_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/app_list/icon_cache.h b/ui/app_list/icon_cache.h
index 75ffa067..06a07ca 100644
--- a/ui/app_list/icon_cache.h
+++ b/ui/app_list/icon_cache.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_ICON_CACHE_H_
 #define UI_APP_LIST_ICON_CACHE_H_
-#pragma once
 
 #include <map>
 #include <string>
diff --git a/ui/app_list/page_switcher.h b/ui/app_list/page_switcher.h
index 4d892aa..9e338a8 100644
--- a/ui/app_list/page_switcher.h
+++ b/ui/app_list/page_switcher.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_PAGE_SWITCHER_H_
 #define UI_APP_LIST_PAGE_SWITCHER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/app_list/pagination_model_observer.h"
diff --git a/ui/app_list/pagination_model.h b/ui/app_list/pagination_model.h
index 8e3ee3b..abf2100 100644
--- a/ui/app_list/pagination_model.h
+++ b/ui/app_list/pagination_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_PAGINATION_MODEL_H_
 #define UI_APP_LIST_PAGINATION_MODEL_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/app_list/pagination_model_observer.h b/ui/app_list/pagination_model_observer.h
index b7974d5..f60a2ff 100644
--- a/ui/app_list/pagination_model_observer.h
+++ b/ui/app_list/pagination_model_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_PAGINATION_MODEL_OBSERVER_H_
 #define UI_APP_LIST_PAGINATION_MODEL_OBSERVER_H_
-#pragma once
 
 #include "ui/app_list/app_list_export.h"
 
diff --git a/ui/app_list/search_box_model.h b/ui/app_list/search_box_model.h
index fb1012f..1df1429 100644
--- a/ui/app_list/search_box_model.h
+++ b/ui/app_list/search_box_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_SEARCH_BOX_MODEL_H_
 #define UI_APP_LIST_SEARCH_BOX_MODEL_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
diff --git a/ui/app_list/search_box_model_observer.h b/ui/app_list/search_box_model_observer.h
index 0393ade..b4cc40c 100644
--- a/ui/app_list/search_box_model_observer.h
+++ b/ui/app_list/search_box_model_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_SEARCH_BOX_MODEL_OBSERVER_H_
 #define UI_APP_LIST_SEARCH_BOX_MODEL_OBSERVER_H_
-#pragma once
 
 #include "ui/app_list/app_list_export.h"
 
diff --git a/ui/app_list/search_box_view.h b/ui/app_list/search_box_view.h
index 3f7cdcd..10e4be2 100644
--- a/ui/app_list/search_box_view.h
+++ b/ui/app_list/search_box_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_SEARCH_BOX_VIEW_H_
 #define UI_APP_LIST_SEARCH_BOX_VIEW_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/app_list/search_box_view_delegate.h b/ui/app_list/search_box_view_delegate.h
index c79b72a..16b3938 100644
--- a/ui/app_list/search_box_view_delegate.h
+++ b/ui/app_list/search_box_view_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_SEARCH_BOX_VIEW_DELEGATE_H_
 #define UI_APP_LIST_SEARCH_BOX_VIEW_DELEGATE_H_
-#pragma once
 
 #include "ui/app_list/app_list_export.h"
 
diff --git a/ui/app_list/search_result.h b/ui/app_list/search_result.h
index 9aee8f4..f96d8d4 100644
--- a/ui/app_list/search_result.h
+++ b/ui/app_list/search_result.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_SEARCH_RESULT_H_
 #define UI_APP_LIST_SEARCH_RESULT_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/app_list/search_result_list_view.h b/ui/app_list/search_result_list_view.h
index 2ba4f7d..1244609 100644
--- a/ui/app_list/search_result_list_view.h
+++ b/ui/app_list/search_result_list_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_SEARCH_RESULT_LIST_VIEW_H_
 #define UI_APP_LIST_SEARCH_RESULT_LIST_VIEW_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
diff --git a/ui/app_list/search_result_list_view_delegate.h b/ui/app_list/search_result_list_view_delegate.h
index f0596dc..419bb3e 100644
--- a/ui/app_list/search_result_list_view_delegate.h
+++ b/ui/app_list/search_result_list_view_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_SEARCH_RESULT_LIST_VIEW_DELEGATE_H_
 #define UI_APP_LIST_SEARCH_RESULT_LIST_VIEW_DELEGATE_H_
-#pragma once
 
 #include "ui/app_list/app_list_export.h"
 
diff --git a/ui/app_list/search_result_observer.h b/ui/app_list/search_result_observer.h
index e4be4e51..e539c72 100644
--- a/ui/app_list/search_result_observer.h
+++ b/ui/app_list/search_result_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_SEARCH_RESULT_OBSERVER_H_
 #define UI_APP_LIST_SEARCH_RESULT_OBSERVER_H_
-#pragma once
 
 #include "ui/app_list/app_list_export.h"
 
diff --git a/ui/app_list/search_result_view.h b/ui/app_list/search_result_view.h
index beb1a36..78627ef 100644
--- a/ui/app_list/search_result_view.h
+++ b/ui/app_list/search_result_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_SEARCH_RESULT_VIEW_H_
 #define UI_APP_LIST_SEARCH_RESULT_VIEW_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/app_list/test/app_list_test_suite.h b/ui/app_list/test/app_list_test_suite.h
index ece107e..018ddf1 100644
--- a/ui/app_list/test/app_list_test_suite.h
+++ b/ui/app_list/test/app_list_test_suite.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_APP_LIST_TEST_APP_LIST_TEST_SUITE_H_
 #define UI_APP_LIST_TEST_APP_LIST_TEST_SUITE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/aura/aura_export.h b/ui/aura/aura_export.h
index 09120cc..9db662b 100644
--- a/ui/aura/aura_export.h
+++ b/ui/aura/aura_export.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_AURA_EXPORT_H
 #define UI_AURA_AURA_EXPORT_H
-#pragma once
 
 // Defines AURA_EXPORT so that functionality implemented by the aura module
 // can be exported to consumers.
diff --git a/ui/aura/aura_switches.h b/ui/aura/aura_switches.h
index 46b353a..c6cc0ad 100644
--- a/ui/aura/aura_switches.h
+++ b/ui/aura/aura_switches.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_AURA_SWITCHES_H_
 #define UI_AURA_AURA_SWITCHES_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/client/activation_change_observer.h b/ui/aura/client/activation_change_observer.h
index bcaf900..ae4195a 100644
--- a/ui/aura/client/activation_change_observer.h
+++ b/ui/aura/client/activation_change_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_ACTIVATION_CHANGE_OBSERVER_H_
 #define UI_AURA_CLIENT_ACTIVATION_CHANGE_OBSERVER_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/client/activation_client.h b/ui/aura/client/activation_client.h
index 2d221dc..59841b3 100644
--- a/ui/aura/client/activation_client.h
+++ b/ui/aura/client/activation_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_ACTIVATION_CLIENT_H_
 #define UI_AURA_CLIENT_ACTIVATION_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window.h"
diff --git a/ui/aura/client/activation_delegate.h b/ui/aura/client/activation_delegate.h
index 8f9cf18..8551f85 100644
--- a/ui/aura/client/activation_delegate.h
+++ b/ui/aura/client/activation_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_ACTIVATION_DELEGATE_H_
 #define UI_AURA_CLIENT_ACTIVATION_DELEGATE_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/client/aura_constants.h b/ui/aura/client/aura_constants.h
index 5ded101..1bf2c6a 100644
--- a/ui/aura/client/aura_constants.h
+++ b/ui/aura/client/aura_constants.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_AURA_CONSTANTS_H_
 #define UI_AURA_CLIENT_AURA_CONSTANTS_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window.h"
diff --git a/ui/aura/client/capture_client.h b/ui/aura/client/capture_client.h
index 8de0aff..b244c0c 100644
--- a/ui/aura/client/capture_client.h
+++ b/ui/aura/client/capture_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_CAPTURE_CLIENT_H_
 #define UI_AURA_CLIENT_CAPTURE_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/client/capture_delegate.h b/ui/aura/client/capture_delegate.h
index 340fccf..c727b0a 100644
--- a/ui/aura/client/capture_delegate.h
+++ b/ui/aura/client/capture_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_CAPTURE_DELEGATE_H_
 #define UI_AURA_CLIENT_CAPTURE_DELEGATE_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/client/dispatcher_client.h b/ui/aura/client/dispatcher_client.h
index 4abe298..edd2776 100644
--- a/ui/aura/client/dispatcher_client.h
+++ b/ui/aura/client/dispatcher_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_DISPATCHER_CLIENT_H_
 #define UI_AURA_CLIENT_DISPATCHER_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window.h"
diff --git a/ui/aura/client/drag_drop_client.h b/ui/aura/client/drag_drop_client.h
index 58b00ed..bed334c 100644
--- a/ui/aura/client/drag_drop_client.h
+++ b/ui/aura/client/drag_drop_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_DRAG_DROP_CLIENT_H_
 #define UI_AURA_CLIENT_DRAG_DROP_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/aura/event.h"
diff --git a/ui/aura/client/drag_drop_delegate.h b/ui/aura/client/drag_drop_delegate.h
index 76778f4..01c6645 100644
--- a/ui/aura/client/drag_drop_delegate.h
+++ b/ui/aura/client/drag_drop_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_DRAG_DROP_DELEGATE_H_
 #define UI_AURA_CLIENT_DRAG_DROP_DELEGATE_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/client/event_client.h b/ui/aura/client/event_client.h
index caf3a2b..077e959 100644
--- a/ui/aura/client/event_client.h
+++ b/ui/aura/client/event_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_EVENT_CLIENT_H_
 #define UI_AURA_CLIENT_EVENT_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window.h"
diff --git a/ui/aura/client/screen_position_client.h b/ui/aura/client/screen_position_client.h
index bca59c7..99f7d86 100644
--- a/ui/aura/client/screen_position_client.h
+++ b/ui/aura/client/screen_position_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_SCREEN_POSITION_CLIENT_H_
 #define UI_AURA_SCREEN_POSITION_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window.h"
diff --git a/ui/aura/client/stacking_client.h b/ui/aura/client/stacking_client.h
index 5d104d3..fda9427 100644
--- a/ui/aura/client/stacking_client.h
+++ b/ui/aura/client/stacking_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_STACKING_CLIENT_H_
 #define UI_AURA_CLIENT_STACKING_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/client/tooltip_client.h b/ui/aura/client/tooltip_client.h
index 5e68d82..b9197f1 100644
--- a/ui/aura/client/tooltip_client.h
+++ b/ui/aura/client/tooltip_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_TOOLTIP_CLIENT_H_
 #define UI_AURA_CLIENT_TOOLTIP_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/aura/event.h"
diff --git a/ui/aura/client/user_action_client.h b/ui/aura/client/user_action_client.h
index 4f0d7d9..16f0b9f 100644
--- a/ui/aura/client/user_action_client.h
+++ b/ui/aura/client/user_action_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_USER_ACTION_CLIENT_H_
 #define UI_AURA_CLIENT_USER_ACTION_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/client/visibility_client.h b/ui/aura/client/visibility_client.h
index 4b28ffe..585ab5c 100644
--- a/ui/aura/client/visibility_client.h
+++ b/ui/aura/client/visibility_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_VISIBILITY_CLIENT_H_
 #define UI_AURA_CLIENT_VISIBILITY_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/client/window_move_client.h b/ui/aura/client/window_move_client.h
index 55a1f0c..b6f32a0 100644
--- a/ui/aura/client/window_move_client.h
+++ b/ui/aura/client/window_move_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CLIENT_WINDOW_MOVE_CLIENT_H_
 #define UI_AURA_CLIENT_WINDOW_MOVE_CLIENT_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/client/window_types.h b/ui/aura/client/window_types.h
index 9d8556d..f0a7b77 100644
--- a/ui/aura/client/window_types.h
+++ b/ui/aura/client/window_types.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_WINDOW_TYPES_H_
 #define UI_AURA_WINDOW_TYPES_H_
-#pragma once
 
 namespace aura {
 namespace client {
diff --git a/ui/aura/cursor_delegate.h b/ui/aura/cursor_delegate.h
index b21bbe8..8ae8d70 100644
--- a/ui/aura/cursor_delegate.h
+++ b/ui/aura/cursor_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CURSOR_DELEGATE_H_
 #define UI_AURA_CURSOR_DELEGATE_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/gfx/native_widget_types.h"
diff --git a/ui/aura/cursor_manager.h b/ui/aura/cursor_manager.h
index 2ca4817..84e4207 100644
--- a/ui/aura/cursor_manager.h
+++ b/ui/aura/cursor_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_CURSOR_MANAGER_H_
 #define UI_AURA_CURSOR_MANAGER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/aura/aura_export.h"
diff --git a/ui/aura/desktop/desktop_activation_client.h b/ui/aura/desktop/desktop_activation_client.h
index 884ff45..5954ac2 100644
--- a/ui/aura/desktop/desktop_activation_client.h
+++ b/ui/aura/desktop/desktop_activation_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_DESKTOP_DESTKOP_ACTIVATION_CLIENT_H_
 #define UI_AURA_DESKTOP_DESTKOP_ACTIVATION_CLIENT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
diff --git a/ui/aura/desktop/desktop_dispatcher_client.h b/ui/aura/desktop/desktop_dispatcher_client.h
index 3d7f1dd..434334e 100644
--- a/ui/aura/desktop/desktop_dispatcher_client.h
+++ b/ui/aura/desktop/desktop_dispatcher_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_DESKTOP_DESKTOP_DISPATCHER_CLIENT_H_
 #define UI_AURA_DESKTOP_DESKTOP_DISPATCHER_CLIENT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/aura/client/dispatcher_client.h"
diff --git a/ui/aura/desktop/desktop_screen.h b/ui/aura/desktop/desktop_screen.h
index fc8c30a..a1fe648 100644
--- a/ui/aura/desktop/desktop_screen.h
+++ b/ui/aura/desktop/desktop_screen.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_DESKTOP_DESKTOP_SCREEN_H_
 #define UI_AURA_DESKTOP_DESKTOP_SCREEN_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/desktop/desktop_screen_win.h b/ui/aura/desktop/desktop_screen_win.h
index 51c4f81..7d67b19 100644
--- a/ui/aura/desktop/desktop_screen_win.h
+++ b/ui/aura/desktop/desktop_screen_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_DESKTOP_DESKTOP_SCREEN_WIN_H_
 #define UI_AURA_DESKTOP_DESKTOP_SCREEN_WIN_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/gfx/screen_impl.h"
diff --git a/ui/aura/dispatcher_linux.h b/ui/aura/dispatcher_linux.h
index 229c543..57d98b8 100644
--- a/ui/aura/dispatcher_linux.h
+++ b/ui/aura/dispatcher_linux.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_DISPATCHER_LINUX_H_
 #define UI_AURA_DISPATCHER_LINUX_H_
-#pragma once
 
 #include <map>
 #include <vector>
diff --git a/ui/aura/display_change_observer_x11.h b/ui/aura/display_change_observer_x11.h
index caf3be7..6d7fe60 100644
--- a/ui/aura/display_change_observer_x11.h
+++ b/ui/aura/display_change_observer_x11.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_DISPLAY_CHANGE_OBSERVER_X11_H
 #define UI_AURA_DISPLAY_CHANGE_OBSERVER_X11_H
-#pragma once
 
 #include <X11/Xlib.h>
 
diff --git a/ui/aura/display_manager.h b/ui/aura/display_manager.h
index 023d76b..707d8c2 100644
--- a/ui/aura/display_manager.h
+++ b/ui/aura/display_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_DISPLAY_MANAGER_H_
 #define UI_AURA_DISPLAY_MANAGER_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/aura/display_observer.h b/ui/aura/display_observer.h
index 0399ae6..cdaa08d 100644
--- a/ui/aura/display_observer.h
+++ b/ui/aura/display_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_DISPLAY_OBSERVER_H_
 #define UI_AURA_DISPLAY_OBSERVER_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/env.h b/ui/aura/env.h
index c2b56c7..b68755c 100644
--- a/ui/aura/env.h
+++ b/ui/aura/env.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_ENV_H_
 #define UI_AURA_ENV_H_
-#pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
diff --git a/ui/aura/env_observer.h b/ui/aura/env_observer.h
index cac4e3f..fd41c6d 100644
--- a/ui/aura/env_observer.h
+++ b/ui/aura/env_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_ENV_OBSERVER_H_
 #define UI_AURA_ENV_OBSERVER_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/event.h b/ui/aura/event.h
index e68a185..b4dfcd4 100644
--- a/ui/aura/event.h
+++ b/ui/aura/event.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_EVENT_H_
 #define UI_AURA_EVENT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/aura/event_filter.h b/ui/aura/event_filter.h
index 1011135..6b98b9a 100644
--- a/ui/aura/event_filter.h
+++ b/ui/aura/event_filter.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_EVENT_FILTER_H_
 #define UI_AURA_EVENT_FILTER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/aura/aura_export.h"
diff --git a/ui/aura/event_mac.h b/ui/aura/event_mac.h
index d170380..ab491ff 100644
--- a/ui/aura/event_mac.h
+++ b/ui/aura/event_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_EVENT_MAC_H_
 #define UI_AURA_EVENT_MAC_H_
-#pragma once
 
 #include "base/event_types.h"
 
diff --git a/ui/aura/focus_change_observer.h b/ui/aura/focus_change_observer.h
index 312f8b3..2acf2d9b 100644
--- a/ui/aura/focus_change_observer.h
+++ b/ui/aura/focus_change_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_FOCUS_CHANGE_OBSERVER_H_
 #define UI_AURA_FOCUS_CHANGE_OBSERVER_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/focus_manager.h b/ui/aura/focus_manager.h
index c2a4290..36b8771 100644
--- a/ui/aura/focus_manager.h
+++ b/ui/aura/focus_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_FOCUS_MANAGER_H_
 #define UI_AURA_FOCUS_MANAGER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
diff --git a/ui/aura/layout_manager.h b/ui/aura/layout_manager.h
index c7ca976..2ae4606 100644
--- a/ui/aura/layout_manager.h
+++ b/ui/aura/layout_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_LAYOUT_MANAGER_H_
 #define UI_AURA_LAYOUT_MANAGER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/aura/aura_export.h"
diff --git a/ui/aura/root_window.h b/ui/aura/root_window.h
index 2ed5931..b81888e 100644
--- a/ui/aura/root_window.h
+++ b/ui/aura/root_window.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_ROOT_WINDOW_H_
 #define UI_AURA_ROOT_WINDOW_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/aura/root_window_host.h b/ui/aura/root_window_host.h
index 877c66a..b053a55 100644
--- a/ui/aura/root_window_host.h
+++ b/ui/aura/root_window_host.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_ROOT_WINDOW_HOST_H_
 #define UI_AURA_ROOT_WINDOW_HOST_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/aura/root_window_host_linux.h b/ui/aura/root_window_host_linux.h
index dd19cdb..9d045eb 100644
--- a/ui/aura/root_window_host_linux.h
+++ b/ui/aura/root_window_host_linux.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_ROOT_WINDOW_HOST_LINUX_H_
 #define UI_AURA_ROOT_WINDOW_HOST_LINUX_H_
-#pragma once
 
 #include <X11/Xlib.h>
 
diff --git a/ui/aura/root_window_host_mac.h b/ui/aura/root_window_host_mac.h
index 4150608..e7c26c3 100644
--- a/ui/aura/root_window_host_mac.h
+++ b/ui/aura/root_window_host_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_ROOT_WINDOW_HOST_MAC_H_
 #define UI_AURA_ROOT_WINDOW_HOST_MAC_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/event_types.h"
diff --git a/ui/aura/root_window_host_win.h b/ui/aura/root_window_host_win.h
index 3bed8b5..50a9ee01 100644
--- a/ui/aura/root_window_host_win.h
+++ b/ui/aura/root_window_host_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_ROOT_WINDOW_HOST_WIN_H_
 #define UI_AURA_ROOT_WINDOW_HOST_WIN_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/aura/root_window_host.h"
diff --git a/ui/aura/root_window_mac.h b/ui/aura/root_window_mac.h
index 6ad8ca3..13a044c 100644
--- a/ui/aura/root_window_mac.h
+++ b/ui/aura/root_window_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_ROOT_WINDOW_MAC_H_
 #define UI_AURA_ROOT_WINDOW_MAC_H_
-#pragma once
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ui/aura/root_window_observer.h b/ui/aura/root_window_observer.h
index 813aa0c..9f4cfd9 100644
--- a/ui/aura/root_window_observer.h
+++ b/ui/aura/root_window_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_ROOT_WINDOW_OBSERVER_H_
 #define UI_AURA_ROOT_WINDOW_OBSERVER_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/root_window_view_mac.h b/ui/aura/root_window_view_mac.h
index a49ef32..6617f36 100644
--- a/ui/aura/root_window_view_mac.h
+++ b/ui/aura/root_window_view_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_ROOT_WINDOW_VIEW_MAC_H_
 #define UI_AURA_ROOT_WINDOW_VIEW_MAC_H_
-#pragma once
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ui/aura/shared/compound_event_filter.h b/ui/aura/shared/compound_event_filter.h
index 7788d5f..363287b 100644
--- a/ui/aura/shared/compound_event_filter.h
+++ b/ui/aura/shared/compound_event_filter.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_SHARED_COMPOUND_EVENT_FILTER_H_
 #define UI_AURA_SHARED_COMPOUND_EVENT_FILTER_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/observer_list.h"
diff --git a/ui/aura/shared/input_method_event_filter.h b/ui/aura/shared/input_method_event_filter.h
index 4e37f87..ff82ede5 100644
--- a/ui/aura/shared/input_method_event_filter.h
+++ b/ui/aura/shared/input_method_event_filter.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_SHARED_INPUT_METHOD_EVENT_FILTER_H_
 #define UI_AURA_SHARED_INPUT_METHOD_EVENT_FILTER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/aura/shared/root_window_capture_client.h b/ui/aura/shared/root_window_capture_client.h
index ee979b5..f86485c 100644
--- a/ui/aura/shared/root_window_capture_client.h
+++ b/ui/aura/shared/root_window_capture_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_SHARED_ROOT_WINDOW_CAPTURE_CLIENT_H_
 #define UI_AURA_SHARED_ROOT_WINDOW_CAPTURE_CLIENT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/aura/single_display_manager.h b/ui/aura/single_display_manager.h
index 82bfc35..f9572558 100644
--- a/ui/aura/single_display_manager.h
+++ b/ui/aura/single_display_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_SINGLE_DISPLAY_MANAGER_H_
 #define UI_AURA_SINGLE_DISPLAY_MANAGER_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/aura/aura_export.h"
diff --git a/ui/aura/test/aura_test_base.h b/ui/aura/test/aura_test_base.h
index 5108e20..2b8990a 100644
--- a/ui/aura/test/aura_test_base.h
+++ b/ui/aura/test/aura_test_base.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_AURA_TEST_BASE_H_
 #define UI_AURA_TEST_AURA_TEST_BASE_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/basictypes.h"
diff --git a/ui/aura/test/aura_test_helper.h b/ui/aura/test/aura_test_helper.h
index 3cbaa8d..1a14e58 100644
--- a/ui/aura/test/aura_test_helper.h
+++ b/ui/aura/test/aura_test_helper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_AURA_TEST_HELPER_H_
 #define UI_AURA_TEST_AURA_TEST_HELPER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/aura/test/event_generator.h b/ui/aura/test/event_generator.h
index a402663..0a4ad7d 100644
--- a/ui/aura/test/event_generator.h
+++ b/ui/aura/test/event_generator.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_EVENT_GENERATOR_H_
 #define UI_AURA_TEST_EVENT_GENERATOR_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/keycodes/keyboard_codes.h"
diff --git a/ui/aura/test/test_activation_client.h b/ui/aura/test/test_activation_client.h
index 1a838e5..2ab9f64 100644
--- a/ui/aura/test/test_activation_client.h
+++ b/ui/aura/test/test_activation_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_TEST_ACTIVATION_CLIENT_H_
 #define UI_AURA_TEST_TEST_ACTIVATION_CLIENT_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
diff --git a/ui/aura/test/test_aura_initializer.h b/ui/aura/test/test_aura_initializer.h
index cb276ce..bfbfe2f 100644
--- a/ui/aura/test/test_aura_initializer.h
+++ b/ui/aura/test/test_aura_initializer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_TEST_AURA_INITIALIZER_H_
 #define UI_AURA_TEST_TEST_AURA_INITIALIZER_H_
-#pragma once
 
 #include "base/basictypes.h"
 
diff --git a/ui/aura/test/test_event_filter.h b/ui/aura/test/test_event_filter.h
index 1f51aa1..aa27c64 100644
--- a/ui/aura/test/test_event_filter.h
+++ b/ui/aura/test/test_event_filter.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_TEST_EVENT_FILTER_H_
 #define UI_AURA_TEST_TEST_EVENT_FILTER_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/aura/event_filter.h"
diff --git a/ui/aura/test/test_screen.h b/ui/aura/test/test_screen.h
index 143a979..9363368 100644
--- a/ui/aura/test/test_screen.h
+++ b/ui/aura/test/test_screen.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_TEST_SCREEN_H_
 #define UI_AURA_TEST_TEST_SCREEN_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/gfx/screen_impl.h"
diff --git a/ui/aura/test/test_stacking_client.h b/ui/aura/test/test_stacking_client.h
index 9966874..b5963ce 100644
--- a/ui/aura/test/test_stacking_client.h
+++ b/ui/aura/test/test_stacking_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_TEST_STACKING_CLIENT_H_
 #define UI_AURA_TEST_TEST_STACKING_CLIENT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/aura/test/test_suite.h b/ui/aura/test/test_suite.h
index 93d3348..7544dd1 100644
--- a/ui/aura/test/test_suite.h
+++ b/ui/aura/test/test_suite.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_TEST_SUITE_H_
 #define UI_AURA_TEST_TEST_SUITE_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/test/test_suite.h"
diff --git a/ui/aura/test/test_window_delegate.h b/ui/aura/test/test_window_delegate.h
index 29be9fa..491bbec 100644
--- a/ui/aura/test/test_window_delegate.h
+++ b/ui/aura/test/test_window_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_TEST_WINDOW_DELEGATE_H_
 #define UI_AURA_TEST_TEST_WINDOW_DELEGATE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/aura/test/test_windows.h b/ui/aura/test/test_windows.h
index e0ca117..71dba45 100644
--- a/ui/aura/test/test_windows.h
+++ b/ui/aura/test/test_windows.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_TEST_WINDOWS_H_
 #define UI_AURA_TEST_TEST_WINDOWS_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/aura/ui_controls_aura.h b/ui/aura/ui_controls_aura.h
index b169cec..4007430 100644
--- a/ui/aura/ui_controls_aura.h
+++ b/ui/aura/ui_controls_aura.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_UI_CONTROLS_AURA_H_
 #define UI_AURA_UI_CONTROLS_AURA_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/window.h b/ui/aura/window.h
index 2c76082..c1f98bc 100644
--- a/ui/aura/window.h
+++ b/ui/aura/window.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_WINDOW_H_
 #define UI_AURA_WINDOW_H_
-#pragma once
 
 #include <map>
 #include <string>
diff --git a/ui/aura/window_delegate.h b/ui/aura/window_delegate.h
index 7908a19..778311c 100644
--- a/ui/aura/window_delegate.h
+++ b/ui/aura/window_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_WINDOW_DELEGATE_H_
 #define UI_AURA_WINDOW_DELEGATE_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/base/events.h"
diff --git a/ui/aura/window_observer.h b/ui/aura/window_observer.h
index 108e2be..fa5c4f8 100644
--- a/ui/aura/window_observer.h
+++ b/ui/aura/window_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_WINDOW_OBSERVER_H_
 #define UI_AURA_WINDOW_OBSERVER_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 
diff --git a/ui/aura/window_property.h b/ui/aura/window_property.h
index 118df4c..a2a5979 100644
--- a/ui/aura/window_property.h
+++ b/ui/aura/window_property.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_WINDOW_PROPERTY_H_
 #define UI_AURA_WINDOW_PROPERTY_H_
-#pragma once
 
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window.h"
diff --git a/ui/aura/window_tracker.h b/ui/aura/window_tracker.h
index c032e10..c11ac4b 100644
--- a/ui/aura/window_tracker.h
+++ b/ui/aura/window_tracker.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_WINDOW_LIFE_TRACKER_H_
 #define UI_AURA_WINDOW_LIFE_TRACKER_H_
-#pragma once
 
 #include <set>
 
diff --git a/ui/base/accelerators/accelerator.h b/ui/base/accelerators/accelerator.h
index 6c7753f..2f6e169 100644
--- a/ui/base/accelerators/accelerator.h
+++ b/ui/base/accelerators/accelerator.h
@@ -10,7 +10,6 @@
 
 #ifndef UI_BASE_ACCELERATORS_ACCELERATOR_H_
 #define UI_BASE_ACCELERATORS_ACCELERATOR_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/base/keycodes/keyboard_codes.h"
diff --git a/ui/base/accelerators/accelerator_cocoa.h b/ui/base/accelerators/accelerator_cocoa.h
index 5be4715..4c0736e 100644
--- a/ui/base/accelerators/accelerator_cocoa.h
+++ b/ui/base/accelerators/accelerator_cocoa.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ACCELERATORS_ACCELERATOR_COCOA_H_
 #define UI_BASE_ACCELERATORS_ACCELERATOR_COCOA_H_
-#pragma once
 
 #include <Foundation/Foundation.h>
 
diff --git a/ui/base/accelerators/accelerator_gtk.h b/ui/base/accelerators/accelerator_gtk.h
index 8ec6fd6..3673d24 100644
--- a/ui/base/accelerators/accelerator_gtk.h
+++ b/ui/base/accelerators/accelerator_gtk.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ACCELERATORS_ACCELERATOR_GTK_H_
 #define UI_BASE_ACCELERATORS_ACCELERATOR_GTK_H_
-#pragma once
 
 #include <gdk/gdk.h>
 
diff --git a/ui/base/accelerators/accelerator_manager.h b/ui/base/accelerators/accelerator_manager.h
index 0b50ed4..3310db7 100644
--- a/ui/base/accelerators/accelerator_manager.h
+++ b/ui/base/accelerators/accelerator_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ACCELERATORS_ACCELERATOR_MANAGER_H_
 #define UI_BASE_ACCELERATORS_ACCELERATOR_MANAGER_H_
-#pragma once
 
 #include <list>
 #include <map>
diff --git a/ui/base/accessibility/accessibility_types.h b/ui/base/accessibility/accessibility_types.h
index b50aed1..91e4974 100644
--- a/ui/base/accessibility/accessibility_types.h
+++ b/ui/base/accessibility/accessibility_types.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ACCESSIBILITY_ACCESSIBILITY_TYPES_H_
 #define UI_BASE_ACCESSIBILITY_ACCESSIBILITY_TYPES_H_
-#pragma once
 
 #include "base/basictypes.h"
 
diff --git a/ui/base/accessibility/accessible_text_utils.h b/ui/base/accessibility/accessible_text_utils.h
index 0cf6888..fb9ab7c 100644
--- a/ui/base/accessibility/accessible_text_utils.h
+++ b/ui/base/accessibility/accessible_text_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ACCESSIBILITY_ACCESSIBLE_TEXT_UTILS_H_
 #define UI_BASE_ACCESSIBILITY_ACCESSIBLE_TEXT_UTILS_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/accessibility/accessible_view_state.h b/ui/base/accessibility/accessible_view_state.h
index 2feeec3..c132fcd 100644
--- a/ui/base/accessibility/accessible_view_state.h
+++ b/ui/base/accessibility/accessible_view_state.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ACCESSIBILITY_ACCESSIBLE_VIEW_STATE_H_
 #define UI_BASE_ACCESSIBILITY_ACCESSIBLE_VIEW_STATE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/string16.h"
diff --git a/ui/base/animation/animation.h b/ui/base/animation/animation.h
index 257e99b..0183b7f 100644
--- a/ui/base/animation/animation.h
+++ b/ui/base/animation/animation.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_ANIMATION_H_
 #define UI_BASE_ANIMATION_ANIMATION_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
diff --git a/ui/base/animation/animation_container.h b/ui/base/animation/animation_container.h
index bf4db5d..89f6392 100644
--- a/ui/base/animation/animation_container.h
+++ b/ui/base/animation/animation_container.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_ANIMATION_CONTAINER_H_
 #define UI_BASE_ANIMATION_ANIMATION_CONTAINER_H_
-#pragma once
 
 #include <set>
 
diff --git a/ui/base/animation/animation_container_element.h b/ui/base/animation/animation_container_element.h
index 169347f35..8c082e6 100644
--- a/ui/base/animation/animation_container_element.h
+++ b/ui/base/animation/animation_container_element.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_ANIMATION_CONTAINER_ELEMENT_H_
 #define UI_BASE_ANIMATION_ANIMATION_CONTAINER_ELEMENT_H_
-#pragma once
 
 #include "base/time.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/animation/animation_container_observer.h b/ui/base/animation/animation_container_observer.h
index 5df7650..06948ef 100644
--- a/ui/base/animation/animation_container_observer.h
+++ b/ui/base/animation/animation_container_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_
 #define UI_BASE_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/base/animation/animation_delegate.h b/ui/base/animation/animation_delegate.h
index 43e5062..9a7edbc 100644
--- a/ui/base/animation/animation_delegate.h
+++ b/ui/base/animation/animation_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_ANIMATION_DELEGATE_H_
 #define UI_BASE_ANIMATION_ANIMATION_DELEGATE_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/base/animation/linear_animation.h b/ui/base/animation/linear_animation.h
index 7baf476..9f385d6 100644
--- a/ui/base/animation/linear_animation.h
+++ b/ui/base/animation/linear_animation.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_LINEAR_ANIMATION_H_
 #define UI_BASE_ANIMATION_LINEAR_ANIMATION_H_
-#pragma once
 
 #include "base/time.h"
 #include "ui/base/animation/animation.h"
diff --git a/ui/base/animation/multi_animation.h b/ui/base/animation/multi_animation.h
index 240c6da6..37f04b0 100644
--- a/ui/base/animation/multi_animation.h
+++ b/ui/base/animation/multi_animation.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_MULTI_ANIMATION_H_
 #define UI_BASE_ANIMATION_MULTI_ANIMATION_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/animation/slide_animation.h b/ui/base/animation/slide_animation.h
index 4d90e1d..a5eed76 100644
--- a/ui/base/animation/slide_animation.h
+++ b/ui/base/animation/slide_animation.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_SLIDE_ANIMATION_H_
 #define UI_BASE_ANIMATION_SLIDE_ANIMATION_H_
-#pragma once
 
 #include "ui/base/animation/linear_animation.h"
 #include "ui/base/animation/tween.h"
diff --git a/ui/base/animation/test_animation_delegate.h b/ui/base/animation/test_animation_delegate.h
index e6c4047..0036c37 100644
--- a/ui/base/animation/test_animation_delegate.h
+++ b/ui/base/animation/test_animation_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_TEST_ANIMATION_DELEGATE_H_
 #define UI_BASE_ANIMATION_TEST_ANIMATION_DELEGATE_H_
-#pragma once
 
 #include "base/message_loop.h"
 #include "ui/base/animation/animation_delegate.h"
diff --git a/ui/base/animation/throb_animation.h b/ui/base/animation/throb_animation.h
index 08b2840..4292eee 100644
--- a/ui/base/animation/throb_animation.h
+++ b/ui/base/animation/throb_animation.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_THROB_ANIMATION_H_
 #define UI_BASE_ANIMATION_THROB_ANIMATION_H_
-#pragma once
 
 #include "ui/base/animation/slide_animation.h"
 
diff --git a/ui/base/animation/tween.h b/ui/base/animation/tween.h
index 829fa7d..ca10a0a 100644
--- a/ui/base/animation/tween.h
+++ b/ui/base/animation/tween.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_ANIMATION_TWEEN_H_
 #define UI_BASE_ANIMATION_TWEEN_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/clipboard/clipboard.h b/ui/base/clipboard/clipboard.h
index ab5701a..b98cfc4 100644
--- a/ui/base/clipboard/clipboard.h
+++ b/ui/base/clipboard/clipboard.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_CLIPBOARD_CLIPBOARD_H_
 #define UI_BASE_CLIPBOARD_CLIPBOARD_H_
-#pragma once
 
 #include <map>
 #include <string>
diff --git a/ui/base/clipboard/clipboard_util_win.h b/ui/base/clipboard/clipboard_util_win.h
index 87e503a..24cf540 100644
--- a/ui/base/clipboard/clipboard_util_win.h
+++ b/ui/base/clipboard/clipboard_util_win.h
@@ -6,7 +6,6 @@
 
 #ifndef UI_BASE_CLIPBOARD_CLIPBOARD_UTIL_WIN_H_
 #define UI_BASE_CLIPBOARD_CLIPBOARD_UTIL_WIN_H_
-#pragma once
 
 #include <shlobj.h>
 #include <map>
diff --git a/ui/base/clipboard/custom_data_helper.h b/ui/base/clipboard/custom_data_helper.h
index c01dbdf..ab7aae9 100644
--- a/ui/base/clipboard/custom_data_helper.h
+++ b/ui/base/clipboard/custom_data_helper.h
@@ -9,7 +9,6 @@
 
 #ifndef UI_BASE_CLIPBOARD_CUSTOM_DATA_HELPER_H_
 #define UI_BASE_CLIPBOARD_CUSTOM_DATA_HELPER_H_
-#pragma once
 
 #include <map>
 #include <vector>
diff --git a/ui/base/clipboard/scoped_clipboard_writer.h b/ui/base/clipboard/scoped_clipboard_writer.h
index d4f154b..d2f5b31 100644
--- a/ui/base/clipboard/scoped_clipboard_writer.h
+++ b/ui/base/clipboard/scoped_clipboard_writer.h
@@ -10,7 +10,6 @@
 
 #ifndef UI_BASE_CLIPBOARD_SCOPED_CLIPBOARD_WRITER_H_
 #define UI_BASE_CLIPBOARD_SCOPED_CLIPBOARD_WRITER_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/base/cocoa/base_view.h b/ui/base/cocoa/base_view.h
index e1b4ff1..136b125 100644
--- a/ui/base/cocoa/base_view.h
+++ b/ui/base/cocoa/base_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_COCOA_BASE_VIEW_H_
 #define UI_BASE_COCOA_BASE_VIEW_H_
-#pragma once
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ui/base/cocoa/find_pasteboard.h b/ui/base/cocoa/find_pasteboard.h
index 870e7ec..ec8f309 100644
--- a/ui/base/cocoa/find_pasteboard.h
+++ b/ui/base/cocoa/find_pasteboard.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_COCOA_FIND_PASTEBOARD_H_
 #define UI_BASE_COCOA_FIND_PASTEBOARD_H_
-#pragma once
 
 #include "base/string16.h"
 
diff --git a/ui/base/cocoa/fullscreen_window_manager.h b/ui/base/cocoa/fullscreen_window_manager.h
index 6564ce9..b09493b 100644
--- a/ui/base/cocoa/fullscreen_window_manager.h
+++ b/ui/base/cocoa/fullscreen_window_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_COCOA_FULLSCREEN_WINDOW_MANAGER_H_
 #define UI_BASE_COCOA_FULLSCREEN_WINDOW_MANAGER_H_
-#pragma once
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ui/base/cocoa/nib_loading.h b/ui/base/cocoa/nib_loading.h
index 653aba4..ab8e23f 100644
--- a/ui/base/cocoa/nib_loading.h
+++ b/ui/base/cocoa/nib_loading.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_COCOA_NIB_LOADING_H_
 #define UI_BASE_COCOA_NIB_LOADING_H_
-#pragma once
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ui/base/cocoa/underlay_opengl_hosting_window.h b/ui/base/cocoa/underlay_opengl_hosting_window.h
index d312362..2c5b92a 100644
--- a/ui/base/cocoa/underlay_opengl_hosting_window.h
+++ b/ui/base/cocoa/underlay_opengl_hosting_window.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_COCOA_UNDERLAY_OPENGL_HOSTING_WINDOW_H_
 #define UI_BASE_COCOA_UNDERLAY_OPENGL_HOSTING_WINDOW_H_
-#pragma once
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ui/base/cocoa/window_size_constants.h b/ui/base/cocoa/window_size_constants.h
index 9f33336..11cf318 100644
--- a/ui/base/cocoa/window_size_constants.h
+++ b/ui/base/cocoa/window_size_constants.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_COCOA_WINDOW_SIZE_CONSTANTS_H_
 #define UI_BASE_COCOA_WINDOW_SIZE_CONSTANTS_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/base/cursor/cursor.h b/ui/base/cursor/cursor.h
index 09076e9..56529e9 100644
--- a/ui/base/cursor/cursor.h
+++ b/ui/base/cursor/cursor.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_CURSOR_CURSOR_H_
 #define UI_BASE_CURSOR_CURSOR_H_
-#pragma once
 
 #include "build/build_config.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/dialogs/base_shell_dialog.h b/ui/base/dialogs/base_shell_dialog.h
index de15a32..a4b954f 100644
--- a/ui/base/dialogs/base_shell_dialog.h
+++ b/ui/base/dialogs/base_shell_dialog.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DIALOGS_BASE_SHELL_DIALOG_H_
 #define UI_BASE_DIALOGS_BASE_SHELL_DIALOG_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 #include "ui/gfx/native_widget_types.h"
diff --git a/ui/base/dialogs/select_file_policy.h b/ui/base/dialogs/select_file_policy.h
index 36fe427..63e8781 100644
--- a/ui/base/dialogs/select_file_policy.h
+++ b/ui/base/dialogs/select_file_policy.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DIALOGS_SELECT_FILE_POLICY_H_
 #define UI_BASE_DIALOGS_SELECT_FILE_POLICY_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/base/dialogs/selected_file_info.h b/ui/base/dialogs/selected_file_info.h
index 88029ba..005de6f 100644
--- a/ui/base/dialogs/selected_file_info.h
+++ b/ui/base/dialogs/selected_file_info.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DIALOGS_SELECTED_FILE_INFO_H_
 #define UI_BASE_DIALOGS_SELECTED_FILE_INFO_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/dragdrop/cocoa_dnd_util.h b/ui/base/dragdrop/cocoa_dnd_util.h
index 5f3bd3b..66ed1a2 100644
--- a/ui/base/dragdrop/cocoa_dnd_util.h
+++ b/ui/base/dragdrop/cocoa_dnd_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_MAC_DND_UTIL_H_
 #define UI_BASE_DRAGDROP_MAC_DND_UTIL_H_
-#pragma once
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ui/base/dragdrop/download_file_interface.h b/ui/base/dragdrop/download_file_interface.h
index 5b98510..3d90444 100644
--- a/ui/base/dragdrop/download_file_interface.h
+++ b/ui/base/dragdrop/download_file_interface.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_
 #define UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_
-#pragma once
 
 #include "build/build_config.h"
 
diff --git a/ui/base/dragdrop/drag_drop_types.h b/ui/base/dragdrop/drag_drop_types.h
index e042332..26befc5 100644
--- a/ui/base/dragdrop/drag_drop_types.h
+++ b/ui/base/dragdrop/drag_drop_types.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_DRAG_DROP_TYPES_H_
 #define UI_BASE_DRAGDROP_DRAG_DROP_TYPES_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/dragdrop/drag_source.h b/ui/base/dragdrop/drag_source.h
index 777a8ee..37969fe 100644
--- a/ui/base/dragdrop/drag_source.h
+++ b/ui/base/dragdrop/drag_source.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_DRAG_SOURCE_H_
 #define UI_BASE_DRAGDROP_DRAG_SOURCE_H_
-#pragma once
 
 #include <objidl.h>
 
diff --git a/ui/base/dragdrop/drag_utils.h b/ui/base/dragdrop/drag_utils.h
index 7c8e443..c2bf02c 100644
--- a/ui/base/dragdrop/drag_utils.h
+++ b/ui/base/dragdrop/drag_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_DRAG_UTILS_H_
 #define UI_BASE_DRAGDROP_DRAG_UTILS_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/base/dragdrop/drop_target.h b/ui/base/dragdrop/drop_target.h
index 8099a61..ffab014 100644
--- a/ui/base/dragdrop/drop_target.h
+++ b/ui/base/dragdrop/drop_target.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_DROP_TARGET_H_
 #define UI_BASE_DRAGDROP_DROP_TARGET_H_
-#pragma once
 
 #include <objidl.h>
 
diff --git a/ui/base/dragdrop/gtk_dnd_util.h b/ui/base/dragdrop/gtk_dnd_util.h
index 0f0d29a..b9ac52c 100644
--- a/ui/base/dragdrop/gtk_dnd_util.h
+++ b/ui/base/dragdrop/gtk_dnd_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_GTK_DND_UTIL_H_
 #define UI_BASE_DRAGDROP_GTK_DND_UTIL_H_
-#pragma once
 
 #include <gtk/gtk.h>
 
diff --git a/ui/base/dragdrop/os_exchange_data.h b/ui/base/dragdrop/os_exchange_data.h
index 702a8ab..92b6798 100644
--- a/ui/base/dragdrop/os_exchange_data.h
+++ b/ui/base/dragdrop/os_exchange_data.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_H_
 #define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_H_
-#pragma once
 
 #include "build/build_config.h"
 
diff --git a/ui/base/dragdrop/os_exchange_data_provider_aura.h b/ui/base/dragdrop/os_exchange_data_provider_aura.h
index 6137062..505e2c1 100644
--- a/ui/base/dragdrop/os_exchange_data_provider_aura.h
+++ b/ui/base/dragdrop/os_exchange_data_provider_aura.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_AURA_H_
 #define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_AURA_H_
-#pragma once
 
 #include <map>
 
diff --git a/ui/base/dragdrop/os_exchange_data_provider_gtk.h b/ui/base/dragdrop/os_exchange_data_provider_gtk.h
index e43afbe..98cb739 100644
--- a/ui/base/dragdrop/os_exchange_data_provider_gtk.h
+++ b/ui/base/dragdrop/os_exchange_data_provider_gtk.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_GTK_H_
 #define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_GTK_H_
-#pragma once
 
 #include <gtk/gtk.h>
 #include <map>
diff --git a/ui/base/dragdrop/os_exchange_data_provider_win.h b/ui/base/dragdrop/os_exchange_data_provider_win.h
index 40ef08f..576445f 100644
--- a/ui/base/dragdrop/os_exchange_data_provider_win.h
+++ b/ui/base/dragdrop/os_exchange_data_provider_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_WIN_H_
 #define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_WIN_H_
-#pragma once
 
 #include <objidl.h>
 #include <shlobj.h>
diff --git a/ui/base/events.h b/ui/base/events.h
index 6f7ed0d..1a1c8f3 100644
--- a/ui/base/events.h
+++ b/ui/base/events.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_EVENTS_H_
 #define UI_BASE_EVENTS_H_
-#pragma once
 
 #include "base/event_types.h"
 #include "ui/base/keycodes/keyboard_codes.h"
diff --git a/ui/base/gestures/gesture_configuration.h b/ui/base/gestures/gesture_configuration.h
index b439ef3..206ce91 100644
--- a/ui/base/gestures/gesture_configuration.h
+++ b/ui/base/gestures/gesture_configuration.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GESTURES_GESTURE_CONFIGURATION_H_
 #define UI_BASE_GESTURES_GESTURE_CONFIGURATION_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/gestures/gesture_point.h b/ui/base/gestures/gesture_point.h
index d019892..2ddf50c 100644
--- a/ui/base/gestures/gesture_point.h
+++ b/ui/base/gestures/gesture_point.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GESTURES_GESTURE_POINT_H_
 #define UI_BASE_GESTURES_GESTURE_POINT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/gestures/velocity_calculator.h"
diff --git a/ui/base/gestures/gesture_recognizer.h b/ui/base/gestures/gesture_recognizer.h
index a820824..d8a7663 100644
--- a/ui/base/gestures/gesture_recognizer.h
+++ b/ui/base/gestures/gesture_recognizer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GESTURES_GESTURE_RECOGNIZER_H_
 #define UI_BASE_GESTURES_GESTURE_RECOGNIZER_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/gestures/gesture_recognizer_impl.h b/ui/base/gestures/gesture_recognizer_impl.h
index fbd82d4..8b43001 100644
--- a/ui/base/gestures/gesture_recognizer_impl.h
+++ b/ui/base/gestures/gesture_recognizer_impl.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
 #define UI_BASE_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
-#pragma once
 
 #include <map>
 #include <queue>
diff --git a/ui/base/gestures/gesture_sequence.h b/ui/base/gestures/gesture_sequence.h
index 812e63e..a8be2a6 100644
--- a/ui/base/gestures/gesture_sequence.h
+++ b/ui/base/gestures/gesture_sequence.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GESTURES_GESTURE_SEQUENCE_H_
 #define UI_BASE_GESTURES_GESTURE_SEQUENCE_H_
-#pragma once
 
 #include "base/timer.h"
 #include "ui/base/events.h"
diff --git a/ui/base/gestures/gesture_types.h b/ui/base/gestures/gesture_types.h
index a55914c..09c80b0 100644
--- a/ui/base/gestures/gesture_types.h
+++ b/ui/base/gestures/gesture_types.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GESTURES_GESTURE_TYPES_H_
 #define UI_BASE_GESTURES_GESTURE_TYPES_H_
-#pragma once
 
 #include "base/logging.h"
 #include "base/time.h"
diff --git a/ui/base/gestures/gesture_util.h b/ui/base/gestures/gesture_util.h
index 9b49e85..4e618a9 100644
--- a/ui/base/gestures/gesture_util.h
+++ b/ui/base/gestures/gesture_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GESTURES_GESTURE_UTIL_H_
 #define UI_BASE_GESTURES_GESTURE_UTIL_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/base/gestures/velocity_calculator.h b/ui/base/gestures/velocity_calculator.h
index 1029af3..a6d7919 100644
--- a/ui/base/gestures/velocity_calculator.h
+++ b/ui/base/gestures/velocity_calculator.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GESTURES_VELOCITY_CALCULATOR_H_
 #define UI_BASE_GESTURES_VELOCITY_CALCULATOR_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/glib/glib_integers.h b/ui/base/glib/glib_integers.h
index 4317c27..a875ffe 100644
--- a/ui/base/glib/glib_integers.h
+++ b/ui/base/glib/glib_integers.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GLIB_GLIB_INTEGERS_H_
 #define UI_BASE_GLIB_GLIB_INTEGERS_H_
-#pragma once
 
 // GLib/GObject/Gtk all use their own integer typedefs. They are copied here
 // for forward declaration reasons so we don't pull in all of glib/gtypes.h
diff --git a/ui/base/glib/glib_signal.h b/ui/base/glib/glib_signal.h
index b99a69e..23630f4 100644
--- a/ui/base/glib/glib_signal.h
+++ b/ui/base/glib/glib_signal.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GLIB_GLIB_SIGNAL_H_
 #define UI_BASE_GLIB_GLIB_SIGNAL_H_
-#pragma once
 
 typedef void* gpointer;
 
diff --git a/ui/base/gtk/event_synthesis_gtk.h b/ui/base/gtk/event_synthesis_gtk.h
index f7d16d6..50dde0f 100644
--- a/ui/base/gtk/event_synthesis_gtk.h
+++ b/ui/base/gtk/event_synthesis_gtk.h
@@ -8,7 +8,6 @@
 
 #ifndef UI_BASE_GTK_EVENT_SYNTHESIS_GTK_
 #define UI_BASE_GTK_EVENT_SYNTHESIS_GTK_
-#pragma once
 
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
diff --git a/ui/base/gtk/focus_store_gtk.h b/ui/base/gtk/focus_store_gtk.h
index e237ee1..b0f420d 100644
--- a/ui/base/gtk/focus_store_gtk.h
+++ b/ui/base/gtk/focus_store_gtk.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_FOCUS_STORE_GTK_H_
 #define UI_BASE_GTK_FOCUS_STORE_GTK_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/gtk/g_object_destructor_filo.h b/ui/base/gtk/g_object_destructor_filo.h
index d44bd7f..a01f7e3 100644
--- a/ui/base/gtk/g_object_destructor_filo.h
+++ b/ui/base/gtk/g_object_destructor_filo.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_G_OBJECT_DESTRUCTOR_FILO_H_
 #define UI_BASE_GTK_G_OBJECT_DESTRUCTOR_FILO_H_
-#pragma once
 
 #include <glib.h>
 #include <map>
diff --git a/ui/base/gtk/gdk_x_compat.h b/ui/base/gtk/gdk_x_compat.h
index d304bb9..b53aefc0 100644
--- a/ui/base/gtk/gdk_x_compat.h
+++ b/ui/base/gtk/gdk_x_compat.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_GDK_X_COMPAT_H_
 #define UI_BASE_GTK_GDK_X_COMPAT_H_
-#pragma once
 
 #include <gdk/gdkx.h>
 
diff --git a/ui/base/gtk/gtk_compat.h b/ui/base/gtk/gtk_compat.h
index b0c59e1..0518fad 100644
--- a/ui/base/gtk/gtk_compat.h
+++ b/ui/base/gtk/gtk_compat.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_GTK_COMPAT_H_
 #define UI_BASE_GTK_GTK_COMPAT_H_
-#pragma once
 
 #include <gtk/gtk.h>
 
diff --git a/ui/base/gtk/gtk_expanded_container.h b/ui/base/gtk/gtk_expanded_container.h
index 23f1d69..63e3dbd 100644
--- a/ui/base/gtk/gtk_expanded_container.h
+++ b/ui/base/gtk/gtk_expanded_container.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_GTK_EXPANDED_CONTAINER_H_
 #define UI_BASE_GTK_GTK_EXPANDED_CONTAINER_H_
-#pragma once
 
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
diff --git a/ui/base/gtk/gtk_floating_container.h b/ui/base/gtk/gtk_floating_container.h
index a6977df..2d68edd 100644
--- a/ui/base/gtk/gtk_floating_container.h
+++ b/ui/base/gtk/gtk_floating_container.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_GTK_FLOATING_CONTAINER_H_
 #define UI_BASE_GTK_GTK_FLOATING_CONTAINER_H_
-#pragma once
 
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
diff --git a/ui/base/gtk/gtk_hig_constants.h b/ui/base/gtk/gtk_hig_constants.h
index a2827fe..147c5189 100644
--- a/ui/base/gtk/gtk_hig_constants.h
+++ b/ui/base/gtk/gtk_hig_constants.h
@@ -9,7 +9,6 @@
 
 #ifndef UI_BASE_GTK_GTK_HIG_CONSTANTS_H_
 #define UI_BASE_GTK_GTK_HIG_CONSTANTS_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/base/gtk/gtk_im_context_util.h b/ui/base/gtk/gtk_im_context_util.h
index ae7f2a1..456d6ca 100644
--- a/ui/base/gtk/gtk_im_context_util.h
+++ b/ui/base/gtk/gtk_im_context_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_GTK_IM_CONTEXT_UTIL_H_
 #define UI_BASE_GTK_GTK_IM_CONTEXT_UTIL_H_
-#pragma once
 
 #include <pango/pango-attributes.h>
 
diff --git a/ui/base/gtk/gtk_signal.h b/ui/base/gtk/gtk_signal.h
index 68c96bf..ca6fa23 100644
--- a/ui/base/gtk/gtk_signal.h
+++ b/ui/base/gtk/gtk_signal.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_GTK_SIGNAL_H_
 #define UI_BASE_GTK_GTK_SIGNAL_H_
-#pragma once
 
 #include "ui/base/glib/glib_signal.h"
 
diff --git a/ui/base/gtk/gtk_signal_registrar.h b/ui/base/gtk/gtk_signal_registrar.h
index 630ba31..a7dd157 100644
--- a/ui/base/gtk/gtk_signal_registrar.h
+++ b/ui/base/gtk/gtk_signal_registrar.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_GTK_SIGNAL_REGISTRAR_H_
 #define UI_BASE_GTK_GTK_SIGNAL_REGISTRAR_H_
-#pragma once
 
 #include <glib.h>
 #include <map>
diff --git a/ui/base/gtk/menu_label_accelerator_util.h b/ui/base/gtk/menu_label_accelerator_util.h
index 276a859..dced69f 100644
--- a/ui/base/gtk/menu_label_accelerator_util.h
+++ b/ui/base/gtk/menu_label_accelerator_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_MENU_LABEL_ACCELERATOR_UTIL_H_
 #define UI_BASE_GTK_MENU_LABEL_ACCELERATOR_UTIL_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/base/gtk/owned_widget_gtk.h b/ui/base/gtk/owned_widget_gtk.h
index 73e5f31..ba3068c 100644
--- a/ui/base/gtk/owned_widget_gtk.h
+++ b/ui/base/gtk/owned_widget_gtk.h
@@ -48,7 +48,6 @@
 
 #ifndef UI_BASE_GTK_OWNED_WIDGET_GTK_H_
 #define UI_BASE_GTK_OWNED_WIDGET_GTK_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/gtk/scoped_gobject.h b/ui/base/gtk/scoped_gobject.h
index 5564851..2e62e8f 100644
--- a/ui/base/gtk/scoped_gobject.h
+++ b/ui/base/gtk/scoped_gobject.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_SCOPED_GOBJECT_H_
 #define UI_BASE_GTK_SCOPED_GOBJECT_H_
-#pragma once
 
 #include <glib-object.h>
 
diff --git a/ui/base/gtk/scoped_region.h b/ui/base/gtk/scoped_region.h
index 239e958..faa7e81 100644
--- a/ui/base/gtk/scoped_region.h
+++ b/ui/base/gtk/scoped_region.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GTK_SCOPED_REGION_H_
 #define UI_BASE_GTK_SCOPED_REGION_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/hit_test.h b/ui/base/hit_test.h
index 8a464e9..9fb46a4 100644
--- a/ui/base/hit_test.h
+++ b/ui/base/hit_test.h
@@ -4,7 +4,6 @@
 
 #ifndef VIEWS_WINDOW_HIT_TEST_H_
 #define VIEWS_WINDOW_HIT_TEST_H_
-#pragma once
 
 #if !defined(OS_WIN)
 
diff --git a/ui/base/ime/character_composer.h b/ui/base/ime/character_composer.h
index 6b18002..2a93ee3 100644
--- a/ui/base/ime/character_composer.h
+++ b/ui/base/ime/character_composer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_CHARACTER_COMPOSER_H_
 #define UI_BASE_IME_CHARACTER_COMPOSER_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/ime/composition_text.h b/ui/base/ime/composition_text.h
index 8d76495..085141e 100644
--- a/ui/base/ime/composition_text.h
+++ b/ui/base/ime/composition_text.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_COMPOSITION_TEXT_H_
 #define UI_BASE_IME_COMPOSITION_TEXT_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/base/ime/composition_underline.h"
diff --git a/ui/base/ime/composition_underline.h b/ui/base/ime/composition_underline.h
index 448789c..ecf9d9d 100644
--- a/ui/base/ime/composition_underline.h
+++ b/ui/base/ime/composition_underline.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_COMPOSITION_UNDERLINE_H_
 #define UI_BASE_IME_COMPOSITION_UNDERLINE_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/ime/ibus_client.h b/ui/base/ime/ibus_client.h
index 7a53d44..04a6273 100644
--- a/ui/base/ime/ibus_client.h
+++ b/ui/base/ime/ibus_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_IBUS_CLIENT_H_
 #define UI_BASE_IME_IBUS_CLIENT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/ime/input_method.h b/ui/base/ime/input_method.h
index b89f5fe..d06b0be 100644
--- a/ui/base/ime/input_method.h
+++ b/ui/base/ime/input_method.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_INPUT_METHOD_H_
 #define UI_BASE_IME_INPUT_METHOD_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/base/ime/input_method_base.h b/ui/base/ime/input_method_base.h
index f961c05..61511d0 100644
--- a/ui/base/ime/input_method_base.h
+++ b/ui/base/ime/input_method_base.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_INPUT_METHOD_BASE_H_
 #define UI_BASE_IME_INPUT_METHOD_BASE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/base/ime/input_method_delegate.h b/ui/base/ime/input_method_delegate.h
index 9a84730..c398e27 100644
--- a/ui/base/ime/input_method_delegate.h
+++ b/ui/base/ime/input_method_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_INPUT_METHOD_DELEGATE_H_
 #define UI_BASE_IME_INPUT_METHOD_DELEGATE_H_
-#pragma once
 
 #include "base/event_types.h"
 #include "ui/base/events.h"
diff --git a/ui/base/ime/input_method_factory.h b/ui/base/ime/input_method_factory.h
index 353f5b1..9bb81bc 100644
--- a/ui/base/ime/input_method_factory.h
+++ b/ui/base/ime/input_method_factory.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_INPUT_METHOD_FACTORY_H_
 #define UI_BASE_IME_INPUT_METHOD_FACTORY_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/base/ime/input_method_ibus.h b/ui/base/ime/input_method_ibus.h
index 7ea92fb..d6adc38 100644
--- a/ui/base/ime/input_method_ibus.h
+++ b/ui/base/ime/input_method_ibus.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_INPUT_METHOD_IBUS_H_
 #define UI_BASE_IME_INPUT_METHOD_IBUS_H_
-#pragma once
 
 #include <set>
 #include <string>
diff --git a/ui/base/ime/mock_input_method.h b/ui/base/ime/mock_input_method.h
index 5750441..bafd868 100644
--- a/ui/base/ime/mock_input_method.h
+++ b/ui/base/ime/mock_input_method.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_MOCK_INPUT_METHOD_H_
 #define UI_BASE_IME_MOCK_INPUT_METHOD_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/base/ime/text_input_client.h b/ui/base/ime/text_input_client.h
index 3736e63..1ecc190 100644
--- a/ui/base/ime/text_input_client.h
+++ b/ui/base/ime/text_input_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_TEXT_INPUT_CLIENT_H_
 #define UI_BASE_IME_TEXT_INPUT_CLIENT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/i18n/rtl.h"
diff --git a/ui/base/ime/text_input_type.h b/ui/base/ime/text_input_type.h
index 4f590f4..844bffa 100644
--- a/ui/base/ime/text_input_type.h
+++ b/ui/base/ime/text_input_type.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_IME_TEXT_INPUT_TYPE_H_
 #define UI_BASE_IME_TEXT_INPUT_TYPE_H_
-#pragma once
 
 namespace ui {
 
diff --git a/ui/base/keycodes/keyboard_code_conversion_gtk.h b/ui/base/keycodes/keyboard_code_conversion_gtk.h
index 7a4e167..77e1ef8 100644
--- a/ui/base/keycodes/keyboard_code_conversion_gtk.h
+++ b/ui/base/keycodes/keyboard_code_conversion_gtk.h
@@ -35,7 +35,6 @@
 
 #ifndef UI_BASE_KEYCODES_KEYBOARD_CODE_CONVERSION_GTK_H_
 #define UI_BASE_KEYCODES_KEYBOARD_CODE_CONVERSION_GTK_H_
-#pragma once
 
 #include "ui/base/keycodes/keyboard_codes_posix.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/keycodes/keyboard_code_conversion_win.h b/ui/base/keycodes/keyboard_code_conversion_win.h
index bf9af37..1cf91de 100644
--- a/ui/base/keycodes/keyboard_code_conversion_win.h
+++ b/ui/base/keycodes/keyboard_code_conversion_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_KEYCODES_KEYBOARD_CODE_CONVERSION_WIN_H_
 #define UI_BASE_KEYCODES_KEYBOARD_CODE_CONVERSION_WIN_H_
-#pragma once
 
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/keycodes/keyboard_codes.h b/ui/base/keycodes/keyboard_codes.h
index 53cf8ff..19d6e38 100644
--- a/ui/base/keycodes/keyboard_codes.h
+++ b/ui/base/keycodes/keyboard_codes.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_KEYCODES_KEYBOARD_CODES_H_
 #define UI_BASE_KEYCODES_KEYBOARD_CODES_H_
-#pragma once
 
 #include "build/build_config.h"
 
diff --git a/ui/base/keycodes/keyboard_codes_posix.h b/ui/base/keycodes/keyboard_codes_posix.h
index a2943e7..bfbbacb 100644
--- a/ui/base/keycodes/keyboard_codes_posix.h
+++ b/ui/base/keycodes/keyboard_codes_posix.h
@@ -30,7 +30,6 @@
 
 #ifndef UI_BASE_KEYCODES_KEYBOARD_CODES_POSIX_H_
 #define UI_BASE_KEYCODES_KEYBOARD_CODES_POSIX_H_
-#pragma once
 
 namespace ui {
 
diff --git a/ui/base/keycodes/keyboard_codes_win.h b/ui/base/keycodes/keyboard_codes_win.h
index c13a942..2150b823 100644
--- a/ui/base/keycodes/keyboard_codes_win.h
+++ b/ui/base/keycodes/keyboard_codes_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_KEYCODES_KEYBOARD_CODES_WIN_H_
 #define UI_BASE_KEYCODES_KEYBOARD_CODES_WIN_H_
-#pragma once
 
 #include <windows.h>
 #include <ime.h>
diff --git a/ui/base/l10n/l10n_font_util.h b/ui/base/l10n/l10n_font_util.h
index 6688d31..cfd0d81 100644
--- a/ui/base/l10n/l10n_font_util.h
+++ b/ui/base/l10n/l10n_font_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_L10N_FONT_UTIL_H_
 #define UI_BASE_L10N_FONT_UTIL_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 #include "ui/gfx/size.h"
diff --git a/ui/base/l10n/l10n_util.h b/ui/base/l10n/l10n_util.h
index 2eae6de..777ce757 100644
--- a/ui/base/l10n/l10n_util.h
+++ b/ui/base/l10n/l10n_util.h
@@ -7,7 +7,6 @@
 
 #ifndef UI_BASE_L10N_L10N_UTIL_H_
 #define UI_BASE_L10N_L10N_UTIL_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/base/l10n/l10n_util_collator.h b/ui/base/l10n/l10n_util_collator.h
index 04a5272..4952d1e 100644
--- a/ui/base/l10n/l10n_util_collator.h
+++ b/ui/base/l10n/l10n_util_collator.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_L10N_L10N_UTIL_COLLATOR_H_
 #define UI_BASE_L10N_L10N_UTIL_COLLATOR_H_
-#pragma once
 
 #include <algorithm>
 #include <functional>
diff --git a/ui/base/l10n/l10n_util_mac.h b/ui/base/l10n/l10n_util_mac.h
index cdb044f..274f33c 100644
--- a/ui/base/l10n/l10n_util_mac.h
+++ b/ui/base/l10n/l10n_util_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_L10N_L10N_UTIL_MAC_H_
 #define UI_BASE_L10N_L10N_UTIL_MAC_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/base/l10n/l10n_util_win.h b/ui/base/l10n/l10n_util_win.h
index 1063a1a..d7f47dc 100644
--- a/ui/base/l10n/l10n_util_win.h
+++ b/ui/base/l10n/l10n_util_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_L10N_L10N_UTIL_WIN_H_
 #define UI_BASE_L10N_L10N_UTIL_WIN_H_
-#pragma once
 
 #include <windows.h>
 #include <string>
diff --git a/ui/base/layout.h b/ui/base/layout.h
index 6504e08..2349693 100644
--- a/ui/base/layout.h
+++ b/ui/base/layout.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_LAYOUT_H_
 #define UI_BASE_LAYOUT_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/linux_ui.h b/ui/base/linux_ui.h
index 14ce9dc..5332720 100644
--- a/ui/base/linux_ui.h
+++ b/ui/base/linux_ui.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_LINUX_UI_H_
 #define UI_BASE_LINUX_UI_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 #include "third_party/skia/include/core/SkColor.h"
diff --git a/ui/base/models/button_menu_item_model.h b/ui/base/models/button_menu_item_model.h
index 877d395..a9ef808 100644
--- a/ui/base/models/button_menu_item_model.h
+++ b/ui/base/models/button_menu_item_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_BUTTON_MENU_ITEM_MODEL_H_
 #define UI_BASE_MODELS_BUTTON_MENU_ITEM_MODEL_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/models/combobox_model.h b/ui/base/models/combobox_model.h
index 81fb048..a746e53 100644
--- a/ui/base/models/combobox_model.h
+++ b/ui/base/models/combobox_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_COMBOBOX_MODEL_H_
 #define UI_BASE_MODELS_COMBOBOX_MODEL_H_
-#pragma once
 
 #include "base/string16.h"
 
diff --git a/ui/base/models/list_model.h b/ui/base/models/list_model.h
index 16d0d81..95883fc 100644
--- a/ui/base/models/list_model.h
+++ b/ui/base/models/list_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_LIST_MODEL_H_
 #define UI_BASE_MODELS_LIST_MODEL_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/logging.h"
diff --git a/ui/base/models/list_model_observer.h b/ui/base/models/list_model_observer.h
index 49d4030..4b31cb1 100644
--- a/ui/base/models/list_model_observer.h
+++ b/ui/base/models/list_model_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_LIST_MODEL_OBSERVER_H_
 #define UI_BASE_MODELS_LIST_MODEL_OBSERVER_H_
-#pragma once
 
 #include <stddef.h>
 
diff --git a/ui/base/models/menu_model.h b/ui/base/models/menu_model.h
index f7acb16..a684253 100644
--- a/ui/base/models/menu_model.h
+++ b/ui/base/models/menu_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_MENU_MODEL_H_
 #define UI_BASE_MODELS_MENU_MODEL_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/base/models/menu_model_delegate.h"
diff --git a/ui/base/models/menu_model_delegate.h b/ui/base/models/menu_model_delegate.h
index 9516e59..9e2e335 100644
--- a/ui/base/models/menu_model_delegate.h
+++ b/ui/base/models/menu_model_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_MENU_MODEL_DELEGATE_H_
 #define UI_BASE_MODELS_MENU_MODEL_DELEGATE_H_
-#pragma once
 
 namespace ui {
 
diff --git a/ui/base/models/simple_menu_model.h b/ui/base/models/simple_menu_model.h
index e7c41d9..126d44b 100644
--- a/ui/base/models/simple_menu_model.h
+++ b/ui/base/models/simple_menu_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_SIMPLE_MENU_MODEL_H_
 #define UI_BASE_MODELS_SIMPLE_MENU_MODEL_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/models/table_model.h b/ui/base/models/table_model.h
index 0565cd8..04b2f0d 100644
--- a/ui/base/models/table_model.h
+++ b/ui/base/models/table_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_TABLE_MODEL_H_
 #define UI_BASE_MODELS_TABLE_MODEL_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/models/table_model_observer.h b/ui/base/models/table_model_observer.h
index 38fca30..21ee645 100644
--- a/ui/base/models/table_model_observer.h
+++ b/ui/base/models/table_model_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_TABLE_MODEL_OBSERVER_H_
 #define UI_BASE_MODELS_TABLE_MODEL_OBSERVER_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/base/models/tree_model.h b/ui/base/models/tree_model.h
index 11ea193..52abded 100644
--- a/ui/base/models/tree_model.h
+++ b/ui/base/models/tree_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_TREE_MODEL_H_
 #define UI_BASE_MODELS_TREE_MODEL_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/base/models/tree_node_iterator.h b/ui/base/models/tree_node_iterator.h
index 5a05df9..48843cf 100644
--- a/ui/base/models/tree_node_iterator.h
+++ b/ui/base/models/tree_node_iterator.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_TREE_NODE_ITERATOR_H_
 #define UI_BASE_MODELS_TREE_NODE_ITERATOR_H_
-#pragma once
 
 #include <stack>
 
diff --git a/ui/base/models/tree_node_model.h b/ui/base/models/tree_node_model.h
index 1af826f..0570691 100644
--- a/ui/base/models/tree_node_model.h
+++ b/ui/base/models/tree_node_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_MODELS_TREE_NODE_MODEL_H_
 #define UI_BASE_MODELS_TREE_NODE_MODEL_H_
-#pragma once
 
 #include <algorithm>
 #include <vector>
diff --git a/ui/base/native_theme/native_theme.h b/ui/base/native_theme/native_theme.h
index 7a7af67..4ab8e35 100644
--- a/ui/base/native_theme/native_theme.h
+++ b/ui/base/native_theme/native_theme.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_NATIVE_THEME_NATIVE_THEME_H_
 #define UI_BASE_NATIVE_THEME_NATIVE_THEME_H_
-#pragma once
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/native_theme/native_theme_android.h b/ui/base/native_theme/native_theme_android.h
index 8320f51..8e0ec98 100644
--- a/ui/base/native_theme/native_theme_android.h
+++ b/ui/base/native_theme/native_theme_android.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_NATIVE_THEME_NATIVE_THEME_ANDROID_H_
 #define UI_BASE_NATIVE_THEME_NATIVE_THEME_ANDROID_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/base/native_theme/native_theme_aura.h b/ui/base/native_theme/native_theme_aura.h
index 077a42a..20a6317 100644
--- a/ui/base/native_theme/native_theme_aura.h
+++ b/ui/base/native_theme/native_theme_aura.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_NATIVE_THEME_NATIVE_THEME_AURA_H_
 #define UI_BASE_NATIVE_THEME_NATIVE_THEME_AURA_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/base/native_theme/native_theme_base.h b/ui/base/native_theme/native_theme_base.h
index 706a783..4e892ca 100644
--- a/ui/base/native_theme/native_theme_base.h
+++ b/ui/base/native_theme/native_theme_base.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_NATIVE_THEME_NATIVE_THEME_BASE_H_
 #define UI_BASE_NATIVE_THEME_NATIVE_THEME_BASE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/base/native_theme/native_theme_gtk.h b/ui/base/native_theme/native_theme_gtk.h
index 257d49f..59b62e8 100644
--- a/ui/base/native_theme/native_theme_gtk.h
+++ b/ui/base/native_theme/native_theme_gtk.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_NATIVE_THEME_NATIVE_THEME_GTK_H_
 #define UI_BASE_NATIVE_THEME_NATIVE_THEME_GTK_H_
-#pragma once
 
 #include "ui/base/native_theme/native_theme_base.h"
 
diff --git a/ui/base/native_theme/native_theme_win.h b/ui/base/native_theme/native_theme_win.h
index 260de8d..b68952d 100644
--- a/ui/base/native_theme/native_theme_win.h
+++ b/ui/base/native_theme/native_theme_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_NATIVE_THEME_NATIVE_THEME_WIN_H_
 #define UI_BASE_NATIVE_THEME_NATIVE_THEME_WIN_H_
-#pragma once
 
 // A wrapper class for working with custom XP/Vista themes provided in
 // uxtheme.dll.  This is a singleton class that can be grabbed using
diff --git a/ui/base/range/range.h b/ui/base/range/range.h
index 018a11c..dac8d15 100644
--- a/ui/base/range/range.h
+++ b/ui/base/range/range.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_RANGE_RANGE_H_
 #define UI_BASE_RANGE_RANGE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/base/resource/data_pack.h b/ui/base/resource/data_pack.h
index 4a265e5..08947af 100644
--- a/ui/base/resource/data_pack.h
+++ b/ui/base/resource/data_pack.h
@@ -8,7 +8,6 @@
 
 #ifndef UI_BASE_RESOURCE_DATA_PACK_H_
 #define UI_BASE_RESOURCE_DATA_PACK_H_
-#pragma once
 
 #include <map>
 
diff --git a/ui/base/resource/resource_bundle.h b/ui/base/resource/resource_bundle.h
index 597102e..5eb6104 100644
--- a/ui/base/resource/resource_bundle.h
+++ b/ui/base/resource/resource_bundle.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_RESOURCE_RESOURCE_BUNDLE_H_
 #define UI_BASE_RESOURCE_RESOURCE_BUNDLE_H_
-#pragma once
 
 #include "build/build_config.h"
 
diff --git a/ui/base/resource/resource_bundle_win.h b/ui/base/resource/resource_bundle_win.h
index 207b90c..9a75bed 100644
--- a/ui/base/resource/resource_bundle_win.h
+++ b/ui/base/resource/resource_bundle_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_RESOURCE_RESOURCE_BUNDLE_WIN_
 #define UI_BASE_RESOURCE_RESOURCE_BUNDLE_WIN_
-#pragma once
 
 #include "build/build_config.h"
 
diff --git a/ui/base/resource/resource_data_dll_win.h b/ui/base/resource/resource_data_dll_win.h
index a38dd54..d45ac83 100644
--- a/ui/base/resource/resource_data_dll_win.h
+++ b/ui/base/resource/resource_data_dll_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_RESOURCE_RESOURCE_DATA_DLL_WIN_H_
 #define UI_BASE_RESOURCE_RESOURCE_DATA_DLL_WIN_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/base/resource/resource_handle.h b/ui/base/resource/resource_handle.h
index 1d26e72..267e232 100644
--- a/ui/base/resource/resource_handle.h
+++ b/ui/base/resource/resource_handle.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_RESOURCE_RESOURCE_HANDLE_H_
 #define UI_BASE_RESOURCE_RESOURCE_HANDLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/string_piece.h"
diff --git a/ui/base/test/cocoa_test_event_utils.h b/ui/base/test/cocoa_test_event_utils.h
index a16aa63..0153aaf 100644
--- a/ui/base/test/cocoa_test_event_utils.h
+++ b/ui/base/test/cocoa_test_event_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_TEST_COCOA_TEST_EVENT_UTILS_H_
 #define UI_BASE_TEST_COCOA_TEST_EVENT_UTILS_H_
-#pragma once
 
 #include <utility>
 
diff --git a/ui/base/test/data/resource.h b/ui/base/test/data/resource.h
index bb82442..9043b38 100644
--- a/ui/base/test/data/resource.h
+++ b/ui/base/test/data/resource.h
@@ -20,7 +20,6 @@
 #ifdef APSTUDIO_INVOKED
 #ifndef APSTUDIO_READONLY_SYMBOLS
 #define _APS_NEXT_RESOURCE_VALUE        108
-#pragma once
 #define _APS_NEXT_COMMAND_VALUE         40001
 #define _APS_NEXT_CONTROL_VALUE         1001
 #define _APS_NEXT_SYMED_VALUE           101
diff --git a/ui/base/test/ui_cocoa_test_helper.h b/ui/base/test/ui_cocoa_test_helper.h
index ba0d504..ff24a2f 100644
--- a/ui/base/test/ui_cocoa_test_helper.h
+++ b/ui/base/test/ui_cocoa_test_helper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_TEST_UI_COCOA_TEST_HELPER_H_
 #define UI_BASE_TEST_UI_COCOA_TEST_HELPER_H_
-#pragma once
 
 #include <set>
 
diff --git a/ui/base/text/bytes_formatting.h b/ui/base/text/bytes_formatting.h
index 024c25d..23dc30c 100644
--- a/ui/base/text/bytes_formatting.h
+++ b/ui/base/text/bytes_formatting.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_TEXT_BYTES_FORMATTING_H_
 #define UI_BASE_TEXT_BYTES_FORMATTING_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/string16.h"
diff --git a/ui/base/text/text_elider.h b/ui/base/text/text_elider.h
index 68c392f..20e202d 100644
--- a/ui/base/text/text_elider.h
+++ b/ui/base/text/text_elider.h
@@ -6,7 +6,6 @@
 
 #ifndef UI_BASE_TEXT_TEXT_ELIDER_H_
 #define UI_BASE_TEXT_TEXT_ELIDER_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/base/text/utf16_indexing.h b/ui/base/text/utf16_indexing.h
index 4c4656d..1733938 100644
--- a/ui/base/text/utf16_indexing.h
+++ b/ui/base/text/utf16_indexing.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_TEXT_UTF16_INDEXING_H_
 #define UI_BASE_TEXT_UTF16_INDEXING_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/theme_provider.h b/ui/base/theme_provider.h
index 4aec13d..7b59e11 100644
--- a/ui/base/theme_provider.h
+++ b/ui/base/theme_provider.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_THEME_PROVIDER_H_
 #define UI_BASE_THEME_PROVIDER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkColor.h"
diff --git a/ui/base/touch/touch_factory.h b/ui/base/touch/touch_factory.h
index b12538e..7cad9d1 100644
--- a/ui/base/touch/touch_factory.h
+++ b/ui/base/touch/touch_factory.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_TOUCH_TOUCH_FACTORY_H_
 #define UI_BASE_TOUCH_TOUCH_FACTORY_H_
-#pragma once
 
 #include <bitset>
 #include <map>
diff --git a/ui/base/ui_base_paths.h b/ui/base/ui_base_paths.h
index 7ca95bc..47a7a42 100644
--- a/ui/base/ui_base_paths.h
+++ b/ui/base/ui_base_paths.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_UI_BASE_PATHS_H_
 #define UI_BASE_UI_BASE_PATHS_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/base/ui_base_switches.h b/ui/base/ui_base_switches.h
index 74ec9587..92d532c 100644
--- a/ui/base/ui_base_switches.h
+++ b/ui/base/ui_base_switches.h
@@ -6,7 +6,6 @@
 
 #ifndef UI_BASE_UI_BASE_SWITCHES_H_
 #define UI_BASE_UI_BASE_SWITCHES_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/ui_base_types.h b/ui/base/ui_base_types.h
index 2708dfe..97a8d44 100644
--- a/ui/base/ui_base_types.h
+++ b/ui/base/ui_base_types.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_UI_BASE_TYPES_H_
 #define UI_BASE_UI_BASE_TYPES_H_
-#pragma once
 
 namespace ui {
 
diff --git a/ui/base/ui_export.h b/ui/base/ui_export.h
index 60fc994..ba05e33 100644
--- a/ui/base/ui_export.h
+++ b/ui/base/ui_export.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_UI_EXPORT_H_
 #define UI_UI_EXPORT_H_
-#pragma once
 
 // Defines UI_EXPORT so that functionality implemented by the UI module can be
 // exported to consumers.
diff --git a/ui/base/view_prop.h b/ui/base/view_prop.h
index 68b8561..eae6792 100644
--- a/ui/base/view_prop.h
+++ b/ui/base/view_prop.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_VIEW_PROP_H_
 #define UI_BASE_VIEW_PROP_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
diff --git a/ui/base/win/accessibility_misc_utils.h b/ui/base/win/accessibility_misc_utils.h
index 1613c77..3789efb 100644
--- a/ui/base/win/accessibility_misc_utils.h
+++ b/ui/base/win/accessibility_misc_utils.h
@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 #ifndef UI_BASE_WIN_ACCESSIBILITY_MISC_UTILS_H_
 #define UI_BASE_WIN_ACCESSIBILITY_MISC_UTILS_H_
-#pragma once
 
 #include <atlbase.h>
 #include <atlcom.h>
diff --git a/ui/base/win/atl_module.h b/ui/base/win/atl_module.h
index 3fe3be9..1d1adb4 100644
--- a/ui/base/win/atl_module.h
+++ b/ui/base/win/atl_module.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_ATL_MODULE_H_
 #define UI_BASE_WIN_ATL_MODULE_H_
-#pragma once
 
 #include <atlbase.h>
 #include <atlcom.h>
diff --git a/ui/base/win/dpi.h b/ui/base/win/dpi.h
index 2bb698e..930922a 100644
--- a/ui/base/win/dpi.h
+++ b/ui/base/win/dpi.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_DPI_H_
 #define UI_BASE_WIN_DPI_H_
-#pragma once
 
 #include "ui/gfx/size.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/win/extra_sdk_defines.h b/ui/base/win/extra_sdk_defines.h
index fdc108f..455791e 100644
--- a/ui/base/win/extra_sdk_defines.h
+++ b/ui/base/win/extra_sdk_defines.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_EXTRA_SDK_DEFINES_H_
 #define UI_BASE_WIN_EXTRA_SDK_DEFINES_H_
-#pragma once
 
 #include <windows.h>
 #include <winuser.h>
diff --git a/ui/base/win/foreground_helper.h b/ui/base/win/foreground_helper.h
index a630828..7fc1834 100644
--- a/ui/base/win/foreground_helper.h
+++ b/ui/base/win/foreground_helper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_FOREGROUND_HELPER_H_
 #define UI_BASE_WIN_FOREGROUND_HELPER_H_
-#pragma once
 
 #include "base/logging.h"
 #include "ui/base/win/window_impl.h"
diff --git a/ui/base/win/hwnd_subclass.h b/ui/base/win/hwnd_subclass.h
index 597ab56..834a45a 100644
--- a/ui/base/win/hwnd_subclass.h
+++ b/ui/base/win/hwnd_subclass.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_HWND_SUBCLASS_H_
 #define UI_BASE_WIN_HWND_SUBCLASS_H_
-#pragma once
 
 #include <vector>
 #include <windows.h>
diff --git a/ui/base/win/hwnd_util.h b/ui/base/win/hwnd_util.h
index 09f777a..6339d4c 100644
--- a/ui/base/win/hwnd_util.h
+++ b/ui/base/win/hwnd_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_HWND_UTIL_H_
 #define UI_BASE_WIN_HWND_UTIL_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/base/win/ime_input.h b/ui/base/win/ime_input.h
index ad0e517..dc629e8 100644
--- a/ui/base/win/ime_input.h
+++ b/ui/base/win/ime_input.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_IME_INPUT_H_
 #define UI_BASE_WIN_IME_INPUT_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/base/win/message_box_win.h b/ui/base/win/message_box_win.h
index 49f15ed..d76cf9e 100644
--- a/ui/base/win/message_box_win.h
+++ b/ui/base/win/message_box_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_MESSAGE_BOX_WIN_H_
 #define UI_BASE_WIN_MESSAGE_BOX_WIN_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/base/win/mouse_wheel_util.h b/ui/base/win/mouse_wheel_util.h
index d785265..d6266d7 100644
--- a/ui/base/win/mouse_wheel_util.h
+++ b/ui/base/win/mouse_wheel_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_MOUSE_WHEEL_UTIL_H_
 #define UI_BASE_WIN_MOUSE_WHEEL_UTIL_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/base/win/scoped_ole_initializer.h b/ui/base/win/scoped_ole_initializer.h
index 11cc461..bdf1c3e 100644
--- a/ui/base/win/scoped_ole_initializer.h
+++ b/ui/base/win/scoped_ole_initializer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_SCOPED_OLE_INITIALIZER_H_
 #define UI_BASE_WIN_SCOPED_OLE_INITIALIZER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/base/win/scoped_set_map_mode.h b/ui/base/win/scoped_set_map_mode.h
index dce7aa3..bf2b78d 100644
--- a/ui/base/win/scoped_set_map_mode.h
+++ b/ui/base/win/scoped_set_map_mode.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_SCOPED_SET_MAP_MODE_H_
 #define UI_BASE_WIN_SCOPED_SET_MAP_MODE_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/base/win/shell.h b/ui/base/win/shell.h
index 67e40be..eea303d 100644
--- a/ui/base/win/shell.h
+++ b/ui/base/win/shell.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_SHELL_H_
 #define UI_BASE_WIN_SHELL_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/base/win/singleton_hwnd.h b/ui/base/win/singleton_hwnd.h
index 44ae699..a84b6c0 100644
--- a/ui/base/win/singleton_hwnd.h
+++ b/ui/base/win/singleton_hwnd.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_SINGLETON_HWND_H_
 #define UI_BASE_WIN_SINGLETON_HWND_H_
-#pragma once
 
 #include <windows.h>
 #include <vector>
diff --git a/ui/base/win/window_impl.h b/ui/base/win/window_impl.h
index f4795cb..ca4c473 100644
--- a/ui/base/win/window_impl.h
+++ b/ui/base/win/window_impl.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WIN_WINDOW_IMPL_H_
 #define UI_BASE_WIN_WINDOW_IMPL_H_
-#pragma once
 
 #include <atlbase.h>
 #include <atlapp.h>
diff --git a/ui/base/work_area_watcher_observer.h b/ui/base/work_area_watcher_observer.h
index dda2cf3..63fbf87 100644
--- a/ui/base/work_area_watcher_observer.h
+++ b/ui/base/work_area_watcher_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_WORK_AREA_WATCHER_OBSERVER_H_
 #define UI_BASE_WORK_AREA_WATCHER_OBSERVER_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/base/x/active_window_watcher_x.h b/ui/base/x/active_window_watcher_x.h
index 0358ecb..b64edfe 100644
--- a/ui/base/x/active_window_watcher_x.h
+++ b/ui/base/x/active_window_watcher_x.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_
 #define UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/singleton.h"
diff --git a/ui/base/x/active_window_watcher_x_observer.h b/ui/base/x/active_window_watcher_x_observer.h
index 5369676..e4c71ea 100644
--- a/ui/base/x/active_window_watcher_x_observer.h
+++ b/ui/base/x/active_window_watcher_x_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_OBSERVER_H_
 #define UI_BASE_X_ACTIVE_WINDOW_WATCHER_X_OBSERVER_H_
-#pragma once
 
 #include <gdk/gdk.h>
 
diff --git a/ui/base/x/root_window_property_watcher_x.h b/ui/base/x/root_window_property_watcher_x.h
index 6684e83..f77c2bc 100644
--- a/ui/base/x/root_window_property_watcher_x.h
+++ b/ui/base/x/root_window_property_watcher_x.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_X_ROOT_WINDOW_PROPERTY_WATCHER_X_H_
 #define UI_BASE_X_ROOT_WINDOW_PROPERTY_WATCHER_X_H_
-#pragma once
 
 #include <gdk/gdk.h>
 
diff --git a/ui/base/x/work_area_watcher_x.h b/ui/base/x/work_area_watcher_x.h
index 6412693..99a7849 100644
--- a/ui/base/x/work_area_watcher_x.h
+++ b/ui/base/x/work_area_watcher_x.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_X_WORK_AREA_WATCHER_X_H_
 #define UI_BASE_X_WORK_AREA_WATCHER_X_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/singleton.h"
diff --git a/ui/base/x/x11_util.h b/ui/base/x/x11_util.h
index f0ee270..c555d05 100644
--- a/ui/base/x/x11_util.h
+++ b/ui/base/x/x11_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_X_X11_UTIL_H_
 #define UI_BASE_X_X11_UTIL_H_
-#pragma once
 
 // This file declares utility functions for X11 (Linux only).
 //
diff --git a/ui/base/x/x11_util_internal.h b/ui/base/x/x11_util_internal.h
index 70eb088..b6816c7 100644
--- a/ui/base/x/x11_util_internal.h
+++ b/ui/base/x/x11_util_internal.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_X_X11_UTIL_INTERNAL_H_
 #define UI_BASE_X_X11_UTIL_INTERNAL_H_
-#pragma once
 
 // This file declares utility functions for X11 (Linux only).
 //
diff --git a/ui/compositor/compositor.h b/ui/compositor/compositor.h
index 735954f..0b129cf 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_COMPOSITOR_H_
 #define UI_COMPOSITOR_COMPOSITOR_H_
-#pragma once
 
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
diff --git a/ui/compositor/compositor_export.h b/ui/compositor/compositor_export.h
index 3c70349..e219043 100644
--- a/ui/compositor/compositor_export.h
+++ b/ui/compositor/compositor_export.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_COMPOSITOR_EXPORT_H_
 #define UI_COMPOSITOR_COMPOSITOR_EXPORT_H_
-#pragma once
 
 #if defined(COMPONENT_BUILD)
 #if defined(WIN32)
diff --git a/ui/compositor/compositor_observer.h b/ui/compositor/compositor_observer.h
index 557141a..f76609f 100644
--- a/ui/compositor/compositor_observer.h
+++ b/ui/compositor/compositor_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_COMPOSITOR_OBSERVER_H_
 #define UI_COMPOSITOR_COMPOSITOR_OBSERVER_H_
-#pragma once
 
 #include "ui/compositor/compositor_export.h"
 
diff --git a/ui/compositor/compositor_setup.h b/ui/compositor/compositor_setup.h
index a1e3935..254f389 100644
--- a/ui/compositor/compositor_setup.h
+++ b/ui/compositor/compositor_setup.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_COMPOSITOR_SETUP_H_
 #define UI_COMPOSITOR_COMPOSITOR_SETUP_H_
-#pragma once
 
 #include "ui/compositor/compositor_export.h"
 
diff --git a/ui/compositor/compositor_switches.h b/ui/compositor/compositor_switches.h
index c27f859..966b9a9 100644
--- a/ui/compositor/compositor_switches.h
+++ b/ui/compositor/compositor_switches.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_COMPOSITOR_SWITCHES_H_
 #define UI_COMPOSITOR_COMPOSITOR_SWITCHES_H_
-#pragma once
 
 #include "ui/compositor/compositor_export.h"
 
diff --git a/ui/compositor/debug_utils.h b/ui/compositor/debug_utils.h
index a07d3d3..ad8ea63 100644
--- a/ui/compositor/debug_utils.h
+++ b/ui/compositor/debug_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_DEBUG_UTILS_H_
 #define UI_COMPOSITOR_DEBUG_UTILS_H_
-#pragma once
 
 #ifndef NDEBUG
 
diff --git a/ui/compositor/dip_util.h b/ui/compositor/dip_util.h
index bf4cdfe..d793dc7 100644
--- a/ui/compositor/dip_util.h
+++ b/ui/compositor/dip_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_DIP_UTIL_H_
 #define UI_COMPOSITOR_DIP_UTIL_H_
-#pragma once
 
 #include "ui/compositor/compositor_export.h"
 #include "base/basictypes.h"
diff --git a/ui/compositor/layer.h b/ui/compositor/layer.h
index c31ec8c..c170c4f 100644
--- a/ui/compositor/layer.h
+++ b/ui/compositor/layer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_LAYER_H_
 #define UI_COMPOSITOR_LAYER_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/compositor/layer_animation_delegate.h b/ui/compositor/layer_animation_delegate.h
index e5a3c30..a1d0de9 100644
--- a/ui/compositor/layer_animation_delegate.h
+++ b/ui/compositor/layer_animation_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_LAYER_ANIMATION_DELEGATE_H_
 #define UI_COMPOSITOR_LAYER_ANIMATION_DELEGATE_H_
-#pragma once
 
 #include "ui/compositor/compositor_export.h"
 #include "ui/gfx/rect.h"
diff --git a/ui/compositor/layer_animation_element.h b/ui/compositor/layer_animation_element.h
index 91e919e..d1e305e 100644
--- a/ui/compositor/layer_animation_element.h
+++ b/ui/compositor/layer_animation_element.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_LAYER_ANIMATION_ELEMENT_H_
 #define UI_COMPOSITOR_LAYER_ANIMATION_ELEMENT_H_
-#pragma once
 
 #include <set>
 
diff --git a/ui/compositor/layer_animation_observer.h b/ui/compositor/layer_animation_observer.h
index 19c1b61..8810090 100644
--- a/ui/compositor/layer_animation_observer.h
+++ b/ui/compositor/layer_animation_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_LAYER_ANIMATION_OBSERVER_H_
 #define UI_COMPOSITOR_LAYER_ANIMATION_OBSERVER_H_
-#pragma once
 
 #include <set>
 
diff --git a/ui/compositor/layer_animation_sequence.h b/ui/compositor/layer_animation_sequence.h
index 9e4b5d2..998dd9f 100644
--- a/ui/compositor/layer_animation_sequence.h
+++ b/ui/compositor/layer_animation_sequence.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_LAYER_ANIMATION_SEQUENCE_H_
 #define UI_COMPOSITOR_LAYER_ANIMATION_SEQUENCE_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/compositor/layer_animator.h b/ui/compositor/layer_animator.h
index 0273e5d..7da7ddf 100644
--- a/ui/compositor/layer_animator.h
+++ b/ui/compositor/layer_animator.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_LAYER_ANIMATOR_H_
 #define UI_COMPOSITOR_LAYER_ANIMATOR_H_
-#pragma once
 
 #include <deque>
 #include <vector>
diff --git a/ui/compositor/layer_delegate.h b/ui/compositor/layer_delegate.h
index 40c90db..12b137f 100644
--- a/ui/compositor/layer_delegate.h
+++ b/ui/compositor/layer_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_LAYER_DELEGATE_H_
 #define UI_COMPOSITOR_LAYER_DELEGATE_H_
-#pragma once
 
 #include "base/callback_forward.h"
 #include "ui/compositor/compositor_export.h"
diff --git a/ui/compositor/layer_owner.h b/ui/compositor/layer_owner.h
index 898e7b0..8f115d5 100644
--- a/ui/compositor/layer_owner.h
+++ b/ui/compositor/layer_owner.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_LAYER_OWNER_H_
 #define UI_COMPOSITOR_LAYER_OWNER_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/compositor/layer_type.h b/ui/compositor/layer_type.h
index b22eb2b..3a654a7 100644
--- a/ui/compositor/layer_type.h
+++ b/ui/compositor/layer_type.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_LAYER_TYPE_H_
 #define UI_COMPOSITOR_LAYER_TYPE_H_
-#pragma once
 
 namespace ui {
 
diff --git a/ui/compositor/scoped_layer_animation_settings.h b/ui/compositor/scoped_layer_animation_settings.h
index 5ca4422..15388e2 100644
--- a/ui/compositor/scoped_layer_animation_settings.h
+++ b/ui/compositor/scoped_layer_animation_settings.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_
 #define UI_COMPOSITOR_SCOPED_LAYER_ANIMATION_SETTINGS_H_
-#pragma once
 
 #include <set>
 
diff --git a/ui/compositor/test/compositor_test_support.h b/ui/compositor/test/compositor_test_support.h
index 7db9f51..3c02076 100644
--- a/ui/compositor/test/compositor_test_support.h
+++ b/ui/compositor/test/compositor_test_support.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_COMPOSITOR_TEST_TEST_SUPPORT_H_
 #define UI_GFX_COMPOSITOR_TEST_TEST_SUPPORT_H_
-#pragma once
 
 namespace ui {
 
diff --git a/ui/compositor/test/test_compositor_host.h b/ui/compositor/test/test_compositor_host.h
index 5cee7e3..092cc9c 100644
--- a/ui/compositor/test/test_compositor_host.h
+++ b/ui/compositor/test/test_compositor_host.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_COMPOSITOR_TEST_TEST_COMPOSITOR_HOST_H_
 #define UI_GFX_COMPOSITOR_TEST_TEST_COMPOSITOR_HOST_H_
-#pragma once
 
 #include "base/message_loop.h"
 
diff --git a/ui/compositor/test/test_layer_animation_delegate.h b/ui/compositor/test/test_layer_animation_delegate.h
index 4b624b9..b1793e0 100644
--- a/ui/compositor/test/test_layer_animation_delegate.h
+++ b/ui/compositor/test/test_layer_animation_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_COMPOSITOR_TEST_TEST_LAYER_ANIMATION_DELEGATE_H_
 #define UI_GFX_COMPOSITOR_TEST_TEST_LAYER_ANIMATION_DELEGATE_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/compositor/layer_animation_delegate.h"
diff --git a/ui/compositor/test/test_layer_animation_observer.h b/ui/compositor/test/test_layer_animation_observer.h
index af0a9d8..cdd8e72 100644
--- a/ui/compositor/test/test_layer_animation_observer.h
+++ b/ui/compositor/test/test_layer_animation_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_COMPOSITOR_TEST_TEST_LAYER_ANIMATION_OBSERVER_
 #define UI_GFX_COMPOSITOR_TEST_TEST_LAYER_ANIMATION_OBSERVER_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/compositor/layer_animation_observer.h"
diff --git a/ui/compositor/test/test_suite.h b/ui/compositor/test/test_suite.h
index 6f64fa6..cd64f38 100644
--- a/ui/compositor/test/test_suite.h
+++ b/ui/compositor/test/test_suite.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_COMPOSITOR_TEST_TEST_SUITE_H_
 #define UI_GFX_COMPOSITOR_TEST_TEST_SUITE_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/compositor/test/test_utils.h b/ui/compositor/test/test_utils.h
index 47f91d9..04006f0 100644
--- a/ui/compositor/test/test_utils.h
+++ b/ui/compositor/test/test_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_COMPOSITOR_TEST_TEST_UTILS_H_
 #define UI_GFX_COMPOSITOR_TEST_TEST_UTILS_H_
-#pragma once
 
 namespace gfx {
 class Rect;
diff --git a/ui/compositor/test_web_graphics_context_3d.h b/ui/compositor/test_web_graphics_context_3d.h
index a1677a1..74ce1c4 100644
--- a/ui/compositor/test_web_graphics_context_3d.h
+++ b/ui/compositor/test_web_graphics_context_3d.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_COMPOSITOR_TEST_WEB_GRAPHICS_CONTEXT_3D_H_
 #define UI_COMPOSITOR_TEST_WEB_GRAPHICS_CONTEXT_3D_H_
-#pragma once
 
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
diff --git a/ui/gfx/blit.h b/ui/gfx/blit.h
index 5b440f9..d2ed2cf 100644
--- a/ui/gfx/blit.h
+++ b/ui/gfx/blit.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_BLIT_H_
 #define UI_GFX_BLIT_H_
-#pragma once
 
 #include "ui/gfx/native_widget_types.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/gfx/canvas.h b/ui/gfx/canvas.h
index 00cd9f9..8256412 100644
--- a/ui/gfx/canvas.h
+++ b/ui/gfx/canvas.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_CANVAS_H_
 #define UI_GFX_CANVAS_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/gfx/canvas_paint.h b/ui/gfx/canvas_paint.h
index 105aea3..1db5341 100644
--- a/ui/gfx/canvas_paint.h
+++ b/ui/gfx/canvas_paint.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_CANVAS_PAINT_H_
 #define UI_GFX_CANVAS_PAINT_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 #include "ui/gfx/native_widget_types.h"
diff --git a/ui/gfx/canvas_skia_paint.h b/ui/gfx/canvas_skia_paint.h
index 3ee6fca..ad92d94 100644
--- a/ui/gfx/canvas_skia_paint.h
+++ b/ui/gfx/canvas_skia_paint.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_CANVAS_SKIA_PAINT_H_
 #define UI_GFX_CANVAS_SKIA_PAINT_H_
-#pragma once
 
 #include "base/logging.h"
 #include "skia/ext/canvas_paint.h"
diff --git a/ui/gfx/codec/jpeg_codec.h b/ui/gfx/codec/jpeg_codec.h
index 60b33a3..2c886eb 100644
--- a/ui/gfx/codec/jpeg_codec.h
+++ b/ui/gfx/codec/jpeg_codec.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_CODEC_JPEG_CODEC_H_
 #define UI_GFX_CODEC_JPEG_CODEC_H_
-#pragma once
 
 #include <stddef.h>
 #include <vector>
diff --git a/ui/gfx/codec/png_codec.h b/ui/gfx/codec/png_codec.h
index 10ffac2..3a6d295 100644
--- a/ui/gfx/codec/png_codec.h
+++ b/ui/gfx/codec/png_codec.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_CODEC_PNG_CODEC_H_
 #define UI_GFX_CODEC_PNG_CODEC_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/gfx/color_analysis.h b/ui/gfx/color_analysis.h
index e61bbb3..adc5e76 100644
--- a/ui/gfx/color_analysis.h
+++ b/ui/gfx/color_analysis.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_COLOR_ANALYSIS_H_
 #define UI_GFX_COLOR_ANALYSIS_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/gfx/color_utils.h b/ui/gfx/color_utils.h
index 0627d34..1ab38c0 100644
--- a/ui/gfx/color_utils.h
+++ b/ui/gfx/color_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_COLOR_UTILS_H_
 #define UI_GFX_COLOR_UTILS_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkColor.h"
diff --git a/ui/gfx/display.h b/ui/gfx/display.h
index 7861ab4..79aef79 100644
--- a/ui/gfx/display.h
+++ b/ui/gfx/display.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_DISPLAY_H_
 #define UI_GFX_DISPLAY_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/gfx/favicon_size.h b/ui/gfx/favicon_size.h
index 5029b31..6b2c6a1 100644
--- a/ui/gfx/favicon_size.h
+++ b/ui/gfx/favicon_size.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_FAVICON_SIZE_H_
 #define UI_GFX_FAVICON_SIZE_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/gfx/font.h b/ui/gfx/font.h
index 2506f98..aa2b1c7 100644
--- a/ui/gfx/font.h
+++ b/ui/gfx/font.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_FONT_H_
 #define UI_GFX_FONT_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/font_list.h b/ui/gfx/font_list.h
index 2f8f073..d070b5b 100644
--- a/ui/gfx/font_list.h
+++ b/ui/gfx/font_list.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_FONT_LIST_H_
 #define UI_GFX_FONT_LIST_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/gfx/font_render_params_linux.h b/ui/gfx/font_render_params_linux.h
index 2604105..7a9339a 100644
--- a/ui/gfx/font_render_params_linux.h
+++ b/ui/gfx/font_render_params_linux.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_FONT_RENDER_PARAMS_LINUX_H_
 #define UI_GFX_FONT_RENDER_PARAMS_LINUX_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/gfx/font_smoothing_win.h b/ui/gfx/font_smoothing_win.h
index 2ab6688..25c16e1 100644
--- a/ui/gfx/font_smoothing_win.h
+++ b/ui/gfx/font_smoothing_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_FONT_SMOOTHING_WIN_H_
 #define UI_GFX_FONT_SMOOTHING_WIN_H_
-#pragma once
 
 namespace gfx {
 
diff --git a/ui/gfx/gdi_util.h b/ui/gfx/gdi_util.h
index 51aca12..0d2daea 100644
--- a/ui/gfx/gdi_util.h
+++ b/ui/gfx/gdi_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_GDI_UTIL_H_
 #define UI_GFX_GDI_UTIL_H_
-#pragma once
 
 #include <vector>
 #include <windows.h>
diff --git a/ui/gfx/gfx_paths.h b/ui/gfx/gfx_paths.h
index 487c27e..24fad8b 100644
--- a/ui/gfx/gfx_paths.h
+++ b/ui/gfx/gfx_paths.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_GFX_PATHS_H_
 #define UI_GFX_GFX_PATHS_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/gfx/gtk_native_view_id_manager.h b/ui/gfx/gtk_native_view_id_manager.h
index 9c207a7..da02dc6 100644
--- a/ui/gfx/gtk_native_view_id_manager.h
+++ b/ui/gfx/gtk_native_view_id_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_GTK_NATIVE_VIEW_ID_MANAGER_H_
 #define UI_GFX_GTK_NATIVE_VIEW_ID_MANAGER_H_
-#pragma once
 
 #include <map>
 
diff --git a/ui/gfx/gtk_preserve_window.h b/ui/gfx/gtk_preserve_window.h
index 4c1cf48..53a821e 100644
--- a/ui/gfx/gtk_preserve_window.h
+++ b/ui/gfx/gtk_preserve_window.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_GTK_PRESERVE_WINDOW_H_
 #define UI_GFX_GTK_PRESERVE_WINDOW_H_
-#pragma once
 
 #include <atk/atk.h>
 #include <gdk/gdk.h>
diff --git a/ui/gfx/gtk_util.h b/ui/gfx/gtk_util.h
index 4429e69..24d4f04 100644
--- a/ui/gfx/gtk_util.h
+++ b/ui/gfx/gtk_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_GTK_UTIL_H_
 #define UI_GFX_GTK_UTIL_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/gfx/icon_util.h b/ui/gfx/icon_util.h
index b24b31b..5e8b956 100644
--- a/ui/gfx/icon_util.h
+++ b/ui/gfx/icon_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_ICON_UTIL_H_
 #define UI_GFX_ICON_UTIL_H_
-#pragma once
 
 #include <windows.h>
 #include <string>
diff --git a/ui/gfx/image/cairo_cached_surface.h b/ui/gfx/image/cairo_cached_surface.h
index 1f61e44..d29d9be 100644
--- a/ui/gfx/image/cairo_cached_surface.h
+++ b/ui/gfx/image/cairo_cached_surface.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_IMAGE_CAIRO_CACHED_SURFACE_H_
 #define UI_GFX_IMAGE_CAIRO_CACHED_SURFACE_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/gfx/image/image.h b/ui/gfx/image/image.h
index 39ce4b7..efc3903 100644
--- a/ui/gfx/image/image.h
+++ b/ui/gfx/image/image.h
@@ -18,7 +18,6 @@
 
 #ifndef UI_GFX_IMAGE_IMAGE_H_
 #define UI_GFX_IMAGE_IMAGE_H_
-#pragma once
 
 #include <map>
 #include <vector>
diff --git a/ui/gfx/image/image_skia.h b/ui/gfx/image/image_skia.h
index 9bcd1b4..e6ab0ac 100644
--- a/ui/gfx/image/image_skia.h
+++ b/ui/gfx/image/image_skia.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_IMAGE_IMAGE_SKIA_H_
 #define UI_GFX_IMAGE_IMAGE_SKIA_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/gfx/image/image_skia_operations.h b/ui/gfx/image/image_skia_operations.h
index 24a5b59..039d1c4 100644
--- a/ui/gfx/image/image_skia_operations.h
+++ b/ui/gfx/image/image_skia_operations.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_IMAGESKIA_OPERATIONS_H_
 #define UI_GFX_IMAGESKIA_OPERATIONS_H_
-#pragma once
 
 #include "base/gtest_prod_util.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/gfx/image/image_skia_rep.h b/ui/gfx/image/image_skia_rep.h
index c7a689c..0376895 100644
--- a/ui/gfx/image/image_skia_rep.h
+++ b/ui/gfx/image/image_skia_rep.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_IMAGE_IMAGE_SKIA_REP_H_
 #define UI_GFX_IMAGE_IMAGE_SKIA_REP_H_
-#pragma once
 
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/layout.h"
diff --git a/ui/gfx/image/image_skia_source.h b/ui/gfx/image/image_skia_source.h
index 7b2e606..11458cb 100644
--- a/ui/gfx/image/image_skia_source.h
+++ b/ui/gfx/image/image_skia_source.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_IMAGE_IMAGE_SKIA_SOURCE_H_
 #define UI_GFX_IMAGE_IMAGE_SKIA_SOURCE_H_
-#pragma once
 
 #include "ui/base/layout.h"
 
diff --git a/ui/gfx/image/image_skia_util_mac.h b/ui/gfx/image/image_skia_util_mac.h
index 1847682..b5f9398 100644
--- a/ui/gfx/image/image_skia_util_mac.h
+++ b/ui/gfx/image/image_skia_util_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_IMAGE_IMAGE_SKIA_UTIL_MAC_H_
 #define UI_GFX_IMAGE_IMAGE_SKIA_UTIL_MAC_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/gfx/image/image_util.h b/ui/gfx/image/image_util.h
index 1cb13b5..06643172 100644
--- a/ui/gfx/image/image_util.h
+++ b/ui/gfx/image/image_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_IMAGE_IMAGE_UTIL_H_
 #define UI_GFX_IMAGE_IMAGE_UTIL_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/gfx/insets.h b/ui/gfx/insets.h
index 7c09f61..1ee439b 100644
--- a/ui/gfx/insets.h
+++ b/ui/gfx/insets.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_INSETS_H_
 #define UI_GFX_INSETS_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/insets_f.h b/ui/gfx/insets_f.h
index 20fb968..3bb6783 100644
--- a/ui/gfx/insets_f.h
+++ b/ui/gfx/insets_f.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_INSETS_F_H_
 #define UI_GFX_INSETS_F_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/interpolated_transform.h b/ui/gfx/interpolated_transform.h
index b37984c..cc1e1c8 100644
--- a/ui/gfx/interpolated_transform.h
+++ b/ui/gfx/interpolated_transform.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_INTERPOLATED_TRANSFORM_H_
 #define UI_GFX_INTERPOLATED_TRANSFORM_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/gfx/mac/nsimage_cache.h b/ui/gfx/mac/nsimage_cache.h
index dbb019c..e43781f 100644
--- a/ui/gfx/mac/nsimage_cache.h
+++ b/ui/gfx/mac/nsimage_cache.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_MAC_NSIMAGE_CACHE_H_
 #define UI_GFX_MAC_NSIMAGE_CACHE_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/gfx/mac/scoped_ns_disable_screen_updates.h b/ui/gfx/mac/scoped_ns_disable_screen_updates.h
index 310672a..86b368c 100644
--- a/ui/gfx/mac/scoped_ns_disable_screen_updates.h
+++ b/ui/gfx/mac/scoped_ns_disable_screen_updates.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_MAC_SCOPED_NS_DISABLE_SCREEN_UPDATES_H_
 #define UI_GFX_MAC_SCOPED_NS_DISABLE_SCREEN_UPDATES_H_
-#pragma once
 
 #import <Cocoa/Cocoa.h>
 
diff --git a/ui/gfx/native_widget_types.h b/ui/gfx/native_widget_types.h
index 6fc848d..fd11d6c 100644
--- a/ui/gfx/native_widget_types.h
+++ b/ui/gfx/native_widget_types.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_NATIVE_WIDGET_TYPES_H_
 #define UI_GFX_NATIVE_WIDGET_TYPES_H_
-#pragma once
 
 #include "build/build_config.h"
 
diff --git a/ui/gfx/pango_util.h b/ui/gfx/pango_util.h
index 8092c52..f14c0e6 100644
--- a/ui/gfx/pango_util.h
+++ b/ui/gfx/pango_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_PANGO_UTIL_H_
 #define UI_GFX_PANGO_UTIL_H_
-#pragma once
 
 #include <cairo/cairo.h>
 #include <pango/pango.h>
diff --git a/ui/gfx/path.h b/ui/gfx/path.h
index 847b749..1e86629 100644
--- a/ui/gfx/path.h
+++ b/ui/gfx/path.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_PATH_H_
 #define UI_GFX_PATH_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkPath.h"
diff --git a/ui/gfx/platform_font.h b/ui/gfx/platform_font.h
index e4e8767..e624847 100644
--- a/ui/gfx/platform_font.h
+++ b/ui/gfx/platform_font.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_PLATFORM_FONT_H_
 #define UI_GFX_PLATFORM_FONT_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/platform_font_mac.h b/ui/gfx/platform_font_mac.h
index f0001b9..0f6fd8e 100644
--- a/ui/gfx/platform_font_mac.h
+++ b/ui/gfx/platform_font_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_PLATFORM_FONT_MAC_H_
 #define UI_GFX_PLATFORM_FONT_MAC_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/gfx/platform_font.h"
diff --git a/ui/gfx/platform_font_pango.h b/ui/gfx/platform_font_pango.h
index 88cb612..77d64ba 100644
--- a/ui/gfx/platform_font_pango.h
+++ b/ui/gfx/platform_font_pango.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_PLATFORM_FONT_PANGO_H_
 #define UI_GFX_PLATFORM_FONT_PANGO_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/gfx/platform_font_win.h b/ui/gfx/platform_font_win.h
index a84b14e..6ed5b56 100644
--- a/ui/gfx/platform_font_win.h
+++ b/ui/gfx/platform_font_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_PLATFORM_FONT_WIN_H_
 #define UI_GFX_PLATFORM_FONT_WIN_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/point.h b/ui/gfx/point.h
index 0ff6294..403610a 100644
--- a/ui/gfx/point.h
+++ b/ui/gfx/point.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_POINT_H_
 #define UI_GFX_POINT_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 #include "ui/gfx/point_base.h"
diff --git a/ui/gfx/point3.h b/ui/gfx/point3.h
index d84aa07..d6ee8f2 100644
--- a/ui/gfx/point3.h
+++ b/ui/gfx/point3.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_POINT3_H_
 #define UI_GFX_POINT3_H_
-#pragma once
 
 #include <cmath>
 
diff --git a/ui/gfx/point_base.h b/ui/gfx/point_base.h
index 32735b9..ad62189b 100644
--- a/ui/gfx/point_base.h
+++ b/ui/gfx/point_base.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_POINT_BASE_H_
 #define UI_GFX_POINT_BASE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/point_f.h b/ui/gfx/point_f.h
index d681dca..e1871d8 100644
--- a/ui/gfx/point_f.h
+++ b/ui/gfx/point_f.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_POINT_F_H_
 #define UI_GFX_POINT_F_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/rect.h b/ui/gfx/rect.h
index c1983a9..62a1ba3 100644
--- a/ui/gfx/rect.h
+++ b/ui/gfx/rect.h
@@ -11,7 +11,6 @@
 
 #ifndef UI_GFX_RECT_H_
 #define UI_GFX_RECT_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/rect_base.h b/ui/gfx/rect_base.h
index 0cb346f..03177e1 100644
--- a/ui/gfx/rect_base.h
+++ b/ui/gfx/rect_base.h
@@ -11,7 +11,6 @@
 
 #ifndef UI_GFX_RECT_BASE_H_
 #define UI_GFX_RECT_BASE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/rect_f.h b/ui/gfx/rect_f.h
index bfb5e86..4a2d642 100644
--- a/ui/gfx/rect_f.h
+++ b/ui/gfx/rect_f.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_RECT_F_H_
 #define UI_GFX_RECT_F_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/render_text.h b/ui/gfx/render_text.h
index d140820..0f8ca50 100644
--- a/ui/gfx/render_text.h
+++ b/ui/gfx/render_text.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_RENDER_TEXT_H_
 #define UI_GFX_RENDER_TEXT_H_
-#pragma once
 
 #include <algorithm>
 #include <cstring>
diff --git a/ui/gfx/render_text_linux.h b/ui/gfx/render_text_linux.h
index b241733..59501f7 100644
--- a/ui/gfx/render_text_linux.h
+++ b/ui/gfx/render_text_linux.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_RENDER_TEXT_LINUX_H_
 #define UI_GFX_RENDER_TEXT_LINUX_H_
-#pragma once
 
 #include <pango/pango.h>
 #include <vector>
diff --git a/ui/gfx/render_text_win.h b/ui/gfx/render_text_win.h
index 897e7120..71dd82e 100644
--- a/ui/gfx/render_text_win.h
+++ b/ui/gfx/render_text_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_RENDER_TEXT_WIN_H_
 #define UI_GFX_RENDER_TEXT_WIN_H_
-#pragma once
 
 #include <usp10.h>
 
diff --git a/ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h b/ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h
index 683cdf4..f4b11ad 100644
--- a/ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h
+++ b/ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SCOPED_NS_GRAPHICS_CONTEXT_SAVE_GSTATE_MAC_H_
 #define UI_GFX_SCOPED_NS_GRAPHICS_CONTEXT_SAVE_GSTATE_MAC_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/gfx/scoped_sk_region.h b/ui/gfx/scoped_sk_region.h
index cf42fd1..b163cc1 100644
--- a/ui/gfx/scoped_sk_region.h
+++ b/ui/gfx/scoped_sk_region.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_BASE_GFX_SCOPED_REGION_GFX_H_
 #define UI_BASE_GFX_SCOPED_REGION_GFX_H_
-#pragma once
 
 #include "third_party/skia/include/core/SkRegion.h"
 
diff --git a/ui/gfx/screen.h b/ui/gfx/screen.h
index 1819a9d..bf9a8f4 100644
--- a/ui/gfx/screen.h
+++ b/ui/gfx/screen.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SCREEN_H_
 #define UI_GFX_SCREEN_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/gfx/screen_impl.h b/ui/gfx/screen_impl.h
index d75dbc5..8698491 100644
--- a/ui/gfx/screen_impl.h
+++ b/ui/gfx/screen_impl.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SCREEN_IMPL_H_
 #define UI_GFX_SCREEN_IMPL_H_
-#pragma once
 
 #include "ui/gfx/display.h"
 #include "ui/gfx/native_widget_types.h"
diff --git a/ui/gfx/scrollbar_size.h b/ui/gfx/scrollbar_size.h
index 57e62a9..43f1ca5 100644
--- a/ui/gfx/scrollbar_size.h
+++ b/ui/gfx/scrollbar_size.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SCROLLBAR_SIZE_H_
 #define UI_GFX_SCROLLBAR_SIZE_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 
diff --git a/ui/gfx/selection_model.h b/ui/gfx/selection_model.h
index c68d6be..92c4d6e 100644
--- a/ui/gfx/selection_model.h
+++ b/ui/gfx/selection_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SELECTION_MODEL_H_
 #define UI_GFX_SELECTION_MODEL_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/shadow_value.h b/ui/gfx/shadow_value.h
index 06f5026..49e5035 100644
--- a/ui/gfx/shadow_value.h
+++ b/ui/gfx/shadow_value.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SHADOW_VALUE_H_
 #define UI_GFX_SHADOW_VALUE_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/gfx/size.h b/ui/gfx/size.h
index 554f07bd..7983de4 100644
--- a/ui/gfx/size.h
+++ b/ui/gfx/size.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SIZE_H_
 #define UI_GFX_SIZE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/size_base.h b/ui/gfx/size_base.h
index a4e4944..f8373e8 100644
--- a/ui/gfx/size_base.h
+++ b/ui/gfx/size_base.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SIZE_BASE_H_
 #define UI_GFX_SIZE_BASE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/size_f.h b/ui/gfx/size_f.h
index 3a04d19..5911500 100644
--- a/ui/gfx/size_f.h
+++ b/ui/gfx/size_f.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SIZE_F_H_
 #define UI_GFX_SIZE_F_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gfx/skbitmap_operations.h b/ui/gfx/skbitmap_operations.h
index 7d221d8..de7513b 100644
--- a/ui/gfx/skbitmap_operations.h
+++ b/ui/gfx/skbitmap_operations.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SKBITMAP_OPERATIONS_H_
 #define UI_GFX_SKBITMAP_OPERATIONS_H_
-#pragma once
 
 #include "base/gtest_prod_util.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/gfx/skia_util.h b/ui/gfx/skia_util.h
index c1e315f..f9e95a0 100644
--- a/ui/gfx/skia_util.h
+++ b/ui/gfx/skia_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SKIA_UTIL_H_
 #define UI_GFX_SKIA_UTIL_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/gfx/skia_utils_gtk.h b/ui/gfx/skia_utils_gtk.h
index a13aeaf..6d56e0f 100644
--- a/ui/gfx/skia_utils_gtk.h
+++ b/ui/gfx/skia_utils_gtk.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SKIA_UTILS_GTK_H_
 #define UI_GFX_SKIA_UTILS_GTK_H_
-#pragma once
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/gfx/sys_color_change_listener.h b/ui/gfx/sys_color_change_listener.h
index ab9c104..522e377 100644
--- a/ui/gfx/sys_color_change_listener.h
+++ b/ui/gfx/sys_color_change_listener.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_SYS_COLOR_CHANGE_LISTENER_H_
 #define UI_GFX_SYS_COLOR_CHANGE_LISTENER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkColor.h"
diff --git a/ui/gfx/transform.h b/ui/gfx/transform.h
index 75871b8..9e60f60 100644
--- a/ui/gfx/transform.h
+++ b/ui/gfx/transform.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_TRANSFORM_H_
 #define UI_GFX_TRANSFORM_H_
-#pragma once
 
 #include "third_party/skia/include/utils/SkMatrix44.h"
 #include "ui/base/ui_export.h"
diff --git a/ui/gfx/transform_util.h b/ui/gfx/transform_util.h
index 02fb0a8..d80ad24 100644
--- a/ui/gfx/transform_util.h
+++ b/ui/gfx/transform_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_TRANSFORM_UTIL_H_
 #define UI_GFX_TRANSFORM_UTIL_H_
-#pragma once
 
 #include "ui/base/ui_export.h"
 #include "ui/gfx/transform.h"
diff --git a/ui/gfx/video_decode_acceleration_support_mac.h b/ui/gfx/video_decode_acceleration_support_mac.h
index d0c5f71..2bcf1a7 100644
--- a/ui/gfx/video_decode_acceleration_support_mac.h
+++ b/ui/gfx/video_decode_acceleration_support_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GFX_VIDEO_DECODE_ACCELERATION_SUPPORT_MAC_H_
 #define UI_GFX_VIDEO_DECODE_ACCELERATION_SUPPORT_MAC_H_
-#pragma once
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <CoreVideo/CoreVideo.h>
diff --git a/ui/gl/android_native_window.h b/ui/gl/android_native_window.h
index e6e899f..78fe416 100644
--- a/ui/gl/android_native_window.h
+++ b/ui/gl/android_native_window.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_ANDROID_NATIVE_WINDOW_H_
 #define UI_GL_ANDROID_NATIVE_WINDOW_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/gl/egl_util.h b/ui/gl/egl_util.h
index bf6a019..57aab2a 100644
--- a/ui/gl/egl_util.h
+++ b/ui/gl/egl_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_EGL_UTIL_H_
 #define UI_GL_EGL_UTIL_H_
-#pragma once
 
 namespace gfx {
 
diff --git a/ui/gl/gl_bindings.h b/ui/gl/gl_bindings.h
index 625dac9..4999e8d 100644
--- a/ui/gl/gl_bindings.h
+++ b/ui/gl/gl_bindings.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_BINDINGS_H_
 #define UI_GL_GL_BINDINGS_H_
-#pragma once
 
 // Includes the platform independent and platform dependent GL headers.
 // Only include this in cc files. It pulls in system headers, including
diff --git a/ui/gl/gl_bindings_skia_in_process.h b/ui/gl/gl_bindings_skia_in_process.h
index 5bd356a..23d54ee 100644
--- a/ui/gl/gl_bindings_skia_in_process.h
+++ b/ui/gl/gl_bindings_skia_in_process.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_BINDINGS_SKIA_IN_PROCESS_H_
 #define UI_GL_GL_BINDINGS_SKIA_IN_PROCESS_H_
-#pragma once
 
 #include "ui/gl/gl_export.h"
 
diff --git a/ui/gl/gl_context.h b/ui/gl/gl_context.h
index dc76c00..6c25ca2 100644
--- a/ui/gl/gl_context.h
+++ b/ui/gl/gl_context.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_CONTEXT_H_
 #define UI_GL_GL_CONTEXT_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gl/gl_context_cgl.h b/ui/gl/gl_context_cgl.h
index 3c42230..1e41b52 100644
--- a/ui/gl/gl_context_cgl.h
+++ b/ui/gl/gl_context_cgl.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_CONTEXT_CGL_H_
 #define UI_GL_GL_CONTEXT_CGL_H_
-#pragma once
 
 #include <OpenGL/CGLTypes.h>
 
diff --git a/ui/gl/gl_context_egl.h b/ui/gl/gl_context_egl.h
index 33e8c94..21b8341 100644
--- a/ui/gl/gl_context_egl.h
+++ b/ui/gl/gl_context_egl.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_CONTEXT_EGL_H_
 #define UI_GL_GL_CONTEXT_EGL_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gl/gl_context_glx.h b/ui/gl/gl_context_glx.h
index 6809e26..8fcd7a7 100644
--- a/ui/gl/gl_context_glx.h
+++ b/ui/gl/gl_context_glx.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_CONTEXT_GLX_H_
 #define UI_GL_GL_CONTEXT_GLX_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gl/gl_context_nsview.h b/ui/gl/gl_context_nsview.h
index 3c54157f..bb2aa78 100644
--- a/ui/gl/gl_context_nsview.h
+++ b/ui/gl/gl_context_nsview.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_CONTEXT_NSVIEW_H_
 #define UI_GL_GL_CONTEXT_NSVIEW_H_
-#pragma once
 
 #import <AppKit/NSOpenGL.h>
 
diff --git a/ui/gl/gl_context_osmesa.h b/ui/gl/gl_context_osmesa.h
index cef3fd9..382e8ce 100644
--- a/ui/gl/gl_context_osmesa.h
+++ b/ui/gl/gl_context_osmesa.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_CONTEXT_OSMESA_H_
 #define UI_GL_GL_CONTEXT_OSMESA_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/gl/gl_context_stub.h b/ui/gl/gl_context_stub.h
index a602f4b..ba130f6 100644
--- a/ui/gl/gl_context_stub.h
+++ b/ui/gl/gl_context_stub.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_CONTEXT_STUB_H_
 #define UI_GL_GL_CONTEXT_STUB_H_
-#pragma once
 
 #include "ui/gl/gl_context.h"
 
diff --git a/ui/gl/gl_context_wgl.h b/ui/gl/gl_context_wgl.h
index 1fc6177..d3f6541 100644
--- a/ui/gl/gl_context_wgl.h
+++ b/ui/gl/gl_context_wgl.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_CONTEXT_WGL_H_
 #define UI_GL_GL_CONTEXT_WGL_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gl/gl_export.h b/ui/gl/gl_export.h
index d8d4d42..5c30b18 100644
--- a/ui/gl/gl_export.h
+++ b/ui/gl/gl_export.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_EXPORT_H_
 #define UI_GL_GL_EXPORT_H_
-#pragma once
 
 #if defined(COMPONENT_BUILD)
 #if defined(WIN32)
diff --git a/ui/gl/gl_fence.h b/ui/gl/gl_fence.h
index 62a7116..6dec821 100644
--- a/ui/gl/gl_fence.h
+++ b/ui/gl/gl_fence.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_FENCE_H_
 #define UI_GL_GL_FENCE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/gl/gl_export.h"
diff --git a/ui/gl/gl_implementation.h b/ui/gl/gl_implementation.h
index 9ee1f2d..654fb45 100644
--- a/ui/gl/gl_implementation.h
+++ b/ui/gl/gl_implementation.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_IMPLEMENTATION_H_
 #define UI_GL_GL_IMPLEMENTATION_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/gl/gl_interface.h b/ui/gl/gl_interface.h
index e5f8fa5..af150de 100644
--- a/ui/gl/gl_interface.h
+++ b/ui/gl/gl_interface.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_INTERFACE_H_
 #define UI_GL_GL_INTERFACE_H_
-#pragma once
 
 // This file implements glue to a GL interface so we can mock it for unit
 // testing. It has to be Desktop GL, not GLES2 as it is used to test the service
diff --git a/ui/gl/gl_share_group.h b/ui/gl/gl_share_group.h
index 2b39ba5..cd81404 100644
--- a/ui/gl/gl_share_group.h
+++ b/ui/gl/gl_share_group.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SHARE_GROUP_H_
 #define UI_GL_GL_SHARE_GROUP_H_
-#pragma once
 
 #include <set>
 
diff --git a/ui/gl/gl_surface.h b/ui/gl/gl_surface.h
index 7b0faee..979dc9f 100644
--- a/ui/gl/gl_surface.h
+++ b/ui/gl/gl_surface.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SURFACE_H_
 #define UI_GL_GL_SURFACE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/gl/gl_surface_android.h b/ui/gl/gl_surface_android.h
index 904274e..48f9a24 100644
--- a/ui/gl/gl_surface_android.h
+++ b/ui/gl/gl_surface_android.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SURFACE_ANDROID_H_
 #define UI_GL_GL_SURFACE_ANDROID_H_
-#pragma once
 
 #include "base/memory/ref_counted.h"
 #include "ui/gl/gl_surface_egl.h"
diff --git a/ui/gl/gl_surface_cgl.h b/ui/gl/gl_surface_cgl.h
index 00886cf..822956a 100644
--- a/ui/gl/gl_surface_cgl.h
+++ b/ui/gl/gl_surface_cgl.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SURFACE_CGL_H_
 #define UI_GL_GL_SURFACE_CGL_H_
-#pragma once
 
 #include "ui/gfx/size.h"
 #include "ui/gl/gl_surface.h"
diff --git a/ui/gl/gl_surface_egl.h b/ui/gl/gl_surface_egl.h
index bce2206..399db43 100644
--- a/ui/gl/gl_surface_egl.h
+++ b/ui/gl/gl_surface_egl.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SURFACE_EGL_H_
 #define UI_GL_GL_SURFACE_EGL_H_
-#pragma once
 
 #if defined(OS_WIN)
 #include <windows.h>
diff --git a/ui/gl/gl_surface_glx.h b/ui/gl/gl_surface_glx.h
index f4416e8..644b51b 100644
--- a/ui/gl/gl_surface_glx.h
+++ b/ui/gl/gl_surface_glx.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SURFACE_GLX_H_
 #define UI_GL_GL_SURFACE_GLX_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/base/x/x11_util.h"
diff --git a/ui/gl/gl_surface_nsview.h b/ui/gl/gl_surface_nsview.h
index 440458b..8344839 100644
--- a/ui/gl/gl_surface_nsview.h
+++ b/ui/gl/gl_surface_nsview.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SURFACE_NSVIEW_H_
 #define UI_GL_GL_SURFACE_NSVIEW_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/gfx/size.h"
diff --git a/ui/gl/gl_surface_osmesa.h b/ui/gl/gl_surface_osmesa.h
index ab3feec..77a3f63 100644
--- a/ui/gl/gl_surface_osmesa.h
+++ b/ui/gl/gl_surface_osmesa.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SURFACE_OSMESA_H_
 #define UI_GL_GL_SURFACE_OSMESA_H_
-#pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/size.h"
diff --git a/ui/gl/gl_surface_stub.h b/ui/gl/gl_surface_stub.h
index 86bbd15..14e24b0 100644
--- a/ui/gl/gl_surface_stub.h
+++ b/ui/gl/gl_surface_stub.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SURFACE_STUB_H_
 #define UI_GL_GL_SURFACE_STUB_H_
-#pragma once
 
 #include "ui/gl/gl_surface.h"
 
diff --git a/ui/gl/gl_surface_wgl.h b/ui/gl/gl_surface_wgl.h
index 6e4f0cd..aa32047 100644
--- a/ui/gl/gl_surface_wgl.h
+++ b/ui/gl/gl_surface_wgl.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SURFACE_WGL_H_
 #define UI_GL_GL_SURFACE_WGL_H_
-#pragma once
 
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_surface.h"
diff --git a/ui/gl/gl_switches.h b/ui/gl/gl_switches.h
index ffda704..7d8706e 100644
--- a/ui/gl/gl_switches.h
+++ b/ui/gl/gl_switches.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GL_SWITCHES_H_
 #define UI_GL_GL_SWITCHES_H_
-#pragma once
 
 // Defines all the command-line switches used by ui/gl.
 
diff --git a/ui/gl/gpu_preference.h b/ui/gl/gpu_preference.h
index 54f814a..867daa1 100644
--- a/ui/gl/gpu_preference.h
+++ b/ui/gl/gpu_preference.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_GPU_PREFERENCE_H_
 #define UI_GL_GPU_PREFERENCE_H_
-#pragma once
 
 namespace gfx {
 
diff --git a/ui/gl/scoped_make_current.h b/ui/gl/scoped_make_current.h
index 3c336f3..41b658b 100644
--- a/ui/gl/scoped_make_current.h
+++ b/ui/gl/scoped_make_current.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_GL_SCOPED_MAKE_CURRENT_H_
 #define UI_GL_SCOPED_MAKE_CURRENT_H_
-#pragma once
 
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_surface.h"
diff --git a/ui/oak/oak.h b/ui/oak/oak.h
index 757ebad..98afcc8 100644
--- a/ui/oak/oak.h
+++ b/ui/oak/oak.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_OAK_OAK_H_
 #define UI_OAK_OAK_H_
-#pragma once
 
 #include "ui/oak/oak_export.h"
 
diff --git a/ui/oak/oak_aura_window_display.h b/ui/oak/oak_aura_window_display.h
index c9818a8..4048578 100644
--- a/ui/oak/oak_aura_window_display.h
+++ b/ui/oak/oak_aura_window_display.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_OAK_OAK_AURA_WINDOW_DISPLAY_H_
 #define UI_OAK_OAK_AURA_WINDOW_DISPLAY_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/oak/oak_details_model.h"
diff --git a/ui/oak/oak_details_model.h b/ui/oak/oak_details_model.h
index 6d8b37a..eb558aa 100644
--- a/ui/oak/oak_details_model.h
+++ b/ui/oak/oak_details_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_OAK_OAK_DETAILS_MODEL_H_
 #define UI_OAK_OAK_DETAILS_MODEL_H_
-#pragma once
 
 #include "ui/base/models/table_model.h"
 
diff --git a/ui/oak/oak_export.h b/ui/oak/oak_export.h
index 51c79ee..726366c 100644
--- a/ui/oak/oak_export.h
+++ b/ui/oak/oak_export.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_OAK_OAK_EXPORT_H_
 #define UI_OAK_OAK_EXPORT_H_
-#pragma once
 
 // Defines AURA_EXPORT so that functionality implemented by the aura module
 // can be exported to consumers.
diff --git a/ui/oak/oak_pretty_print.h b/ui/oak/oak_pretty_print.h
index 9aca3bb..89dcfa4 100644
--- a/ui/oak/oak_pretty_print.h
+++ b/ui/oak/oak_pretty_print.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_OAK_OAK_PRETTY_PRINT_H_
 #define UI_OAK_OAK_PRETTY_PRINT_H_
-#pragma once
 
 #include "base/string16.h"
 
diff --git a/ui/oak/oak_tree_model.h b/ui/oak/oak_tree_model.h
index 19873961..f68912d 100644
--- a/ui/oak/oak_tree_model.h
+++ b/ui/oak/oak_tree_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_OAK_OAK_TREE_MODEL_H_
 #define UI_OAK_OAK_TREE_MODEL_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/base/models/tree_node_model.h"
diff --git a/ui/oak/oak_window.h b/ui/oak/oak_window.h
index b198042..1dca2f8 100644
--- a/ui/oak/oak_window.h
+++ b/ui/oak/oak_window.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_OAK_OAK_WINDOW_H_
 #define UI_OAK_OAK_WINDOW_H_
-#pragma once
 
 #include "ui/oak/oak_tree_model.h"
 #include "ui/views/controls/tree/tree_view_controller.h"
diff --git a/ui/surface/accelerated_surface_mac.h b/ui/surface/accelerated_surface_mac.h
index 73a90fc..e15d24c 100644
--- a/ui/surface/accelerated_surface_mac.h
+++ b/ui/surface/accelerated_surface_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_SURFACE_ACCELERATED_SURFACE_MAC_H_
 #define UI_SURFACE_ACCELERATED_SURFACE_MAC_H_
-#pragma once
 
 #include <CoreFoundation/CoreFoundation.h>
 
diff --git a/ui/surface/accelerated_surface_win.h b/ui/surface/accelerated_surface_win.h
index aea6fe1..f612908 100644
--- a/ui/surface/accelerated_surface_win.h
+++ b/ui/surface/accelerated_surface_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_SURFACE_ACCELERATED_SURFACE_WIN_H_
 #define UI_SURFACE_ACCELERATED_SURFACE_WIN_H_
-#pragma once
 
 #include <d3d9.h>
 
diff --git a/ui/surface/io_surface_support_mac.h b/ui/surface/io_surface_support_mac.h
index afc4e95..3f6d6bb 100644
--- a/ui/surface/io_surface_support_mac.h
+++ b/ui/surface/io_surface_support_mac.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_SURFACE_IO_SURFACE_SUPPORT_MAC_H_
 #define UI_SURFACE_IO_SURFACE_SUPPORT_MAC_H_
-#pragma once
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <CoreVideo/CoreVideo.h>
diff --git a/ui/surface/surface_export.h b/ui/surface/surface_export.h
index 0a01670..1a5fa66 100644
--- a/ui/surface/surface_export.h
+++ b/ui/surface/surface_export.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_SURFACE_SURFACE_EXPORT_H_
 #define UI_SURFACE_SURFACE_EXPORT_H_
-#pragma once
 
 #if defined(COMPONENT_BUILD)
 #if defined(WIN32)
diff --git a/ui/surface/transport_dib.h b/ui/surface/transport_dib.h
index f323f1f..3495c9d 100644
--- a/ui/surface/transport_dib.h
+++ b/ui/surface/transport_dib.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_SURFACE_TRANSPORT_DIB_H_
 #define UI_SURFACE_TRANSPORT_DIB_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/surface/surface_export.h"
diff --git a/ui/test/test_suite.h b/ui/test/test_suite.h
index e7c0e06..a38ec77 100644
--- a/ui/test/test_suite.h
+++ b/ui/test/test_suite.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_TEST_TEST_SUITE_H_
 #define UI_TEST_TEST_SUITE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/ui_controls/ui_controls.h b/ui/ui_controls/ui_controls.h
index cbbeaba..6bfebc8 100644
--- a/ui/ui_controls/ui_controls.h
+++ b/ui/ui_controls/ui_controls.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_UI_CONTROLS_UI_CONTROLS_H_
 #define UI_UI_CONTROLS_UI_CONTROLS_H_
-#pragma once
 
 #include "build/build_config.h"
 
diff --git a/ui/ui_controls/ui_controls_aura.h b/ui/ui_controls/ui_controls_aura.h
index 8b946e0..90778fd 100644
--- a/ui/ui_controls/ui_controls_aura.h
+++ b/ui/ui_controls/ui_controls_aura.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_UI_CONTROLS_UI_CONTROLS_AURA_H_
 #define UI_UI_CONTROLS_UI_CONTROLS_AURA_H_
-#pragma once
 
 #include "base/callback_forward.h"
 #include "ui/base/keycodes/keyboard_codes.h"
diff --git a/ui/views/accessibility/native_view_accessibility_win.h b/ui/views/accessibility/native_view_accessibility_win.h
index 128ec30..dbe51d3 100644
--- a/ui/views/accessibility/native_view_accessibility_win.h
+++ b/ui/views/accessibility/native_view_accessibility_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_WIN_H_
 #define UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_WIN_H_
-#pragma once
 
 #include <atlbase.h>
 #include <atlcom.h>
diff --git a/ui/views/accessible_pane_view.h b/ui/views/accessible_pane_view.h
index 4a150d0..0d563d7 100644
--- a/ui/views/accessible_pane_view.h
+++ b/ui/views/accessible_pane_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_ACCESSIBLE_PANE_VIEW_H_
 #define UI_VIEWS_ACCESSIBLE_PANE_VIEW_H_
-#pragma once
 
 #include "base/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/views/animation/bounds_animator.h b/ui/views/animation/bounds_animator.h
index 69348c9..4082b5c 100644
--- a/ui/views/animation/bounds_animator.h
+++ b/ui/views/animation/bounds_animator.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_ANIMATION_BOUNDS_ANIMATOR_H_
 #define UI_VIEWS_ANIMATION_BOUNDS_ANIMATOR_H_
-#pragma once
 
 #include <map>
 
diff --git a/ui/views/animation/bounds_animator_observer.h b/ui/views/animation/bounds_animator_observer.h
index 8b606a3..37a5243 100644
--- a/ui/views/animation/bounds_animator_observer.h
+++ b/ui/views/animation/bounds_animator_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_ANIMATION_BOUNDS_ANIMATOR_OBSERVER_H_
 #define UI_VIEWS_ANIMATION_BOUNDS_ANIMATOR_OBSERVER_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/animation/scroll_animator.h b/ui/views/animation/scroll_animator.h
index dad27fa..8cc58e4 100644
--- a/ui/views/animation/scroll_animator.h
+++ b/ui/views/animation/scroll_animator.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_ANIMATION_SCROLL_ANIMATOR_H_
 #define UI_VIEWS_ANIMATION_SCROLL_ANIMATOR_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/views/background.h b/ui/views/background.h
index b455f3b..1770491 100644
--- a/ui/views/background.h
+++ b/ui/views/background.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_BACKGROUND_H_
 #define UI_VIEWS_BACKGROUND_H_
-#pragma once
 
 #include "build/build_config.h"
 
diff --git a/ui/views/border.h b/ui/views/border.h
index a362fcc..8c6fd1c 100644
--- a/ui/views/border.h
+++ b/ui/views/border.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_BORDER_H_
 #define UI_VIEWS_BORDER_H_
-#pragma once
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/insets.h"
diff --git a/ui/views/bubble/bubble_border.h b/ui/views/bubble/bubble_border.h
index f18cf4f..0b733dc 100644
--- a/ui/views/bubble/bubble_border.h
+++ b/ui/views/bubble/bubble_border.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_BUBBLE_BUBBLE_BORDER_H_
 #define UI_VIEWS_BUBBLE_BUBBLE_BORDER_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/views/background.h"
diff --git a/ui/views/bubble/bubble_delegate.h b/ui/views/bubble/bubble_delegate.h
index aaabdcd..8b0e128 100644
--- a/ui/views/bubble/bubble_delegate.h
+++ b/ui/views/bubble/bubble_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_BUBBLE_BUBBLE_DELEGATE_H_
 #define UI_VIEWS_BUBBLE_BUBBLE_DELEGATE_H_
-#pragma once
 
 #include "base/gtest_prod_util.h"
 #include "ui/base/animation/animation_delegate.h"
diff --git a/ui/views/bubble/bubble_frame_view.h b/ui/views/bubble/bubble_frame_view.h
index 0d6fa21..319261d 100644
--- a/ui/views/bubble/bubble_frame_view.h
+++ b/ui/views/bubble/bubble_frame_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_BUBBLE_BUBBLE_FRAME_VIEW_H_
 #define UI_VIEWS_BUBBLE_BUBBLE_FRAME_VIEW_H_
-#pragma once
 
 #include "base/gtest_prod_util.h"
 #include "third_party/skia/include/core/SkColor.h"
diff --git a/ui/views/button_drag_utils.h b/ui/views/button_drag_utils.h
index da663d7..f6aada4 100644
--- a/ui/views/button_drag_utils.h
+++ b/ui/views/button_drag_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_BUTTON_DRAG_UTILS_H_
 #define UI_VIEWS_BUTTON_DRAG_UTILS_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/color_chooser/color_chooser_listener.h b/ui/views/color_chooser/color_chooser_listener.h
index 2587d03..029e29e 100644
--- a/ui/views/color_chooser/color_chooser_listener.h
+++ b/ui/views/color_chooser/color_chooser_listener.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_COLOR_CHOOSER_COLOR_CHOOSER_LISTENER_H_
 #define UI_VIEWS_COLOR_CHOOSER_COLOR_CHOOSER_LISTENER_H_
-#pragma once
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/color_chooser/color_chooser_view.h b/ui/views/color_chooser/color_chooser_view.h
index 9033e97..906fb38 100644
--- a/ui/views/color_chooser/color_chooser_view.h
+++ b/ui/views/color_chooser/color_chooser_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_COLOR_CHOOSER_COLOR_CHOOSER_VIEW_H_
 #define UI_VIEWS_COLOR_CHOOSER_COLOR_CHOOSER_VIEW_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/color_constants.h b/ui/views/color_constants.h
index c39f476..fbcff9f 100644
--- a/ui/views/color_constants.h
+++ b/ui/views/color_constants.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_COLOR_CONSTANTS_H_
 #define UI_VIEWS_COLOR_CONSTANTS_H_
-#pragma once
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/context_menu_controller.h b/ui/views/context_menu_controller.h
index e427117..23ebd27 100644
--- a/ui/views/context_menu_controller.h
+++ b/ui/views/context_menu_controller.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTEXT_MENU_CONTROLLER_H_
 #define UI_VIEWS_CONTEXT_MENU_CONTROLLER_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/controls/button/button.h b/ui/views/controls/button/button.h
index 7cba9d1..9b01caf 100644
--- a/ui/views/controls/button/button.h
+++ b/ui/views/controls/button/button.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_BUTTON_H_
-#pragma once
 
 #include "ui/views/view.h"
 
diff --git a/ui/views/controls/button/button_dropdown.h b/ui/views/controls/button/button_dropdown.h
index eec7cbe..b117a69 100644
--- a/ui/views/controls/button/button_dropdown.h
+++ b/ui/views/controls/button/button_dropdown.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_BUTTON_DROPDOWN_H_
 #define UI_VIEWS_CONTROLS_BUTTON_BUTTON_DROPDOWN_H_
-#pragma once
 
 #include "base/memory/weak_ptr.h"
 #include "ui/views/controls/button/image_button.h"
diff --git a/ui/views/controls/button/checkbox.h b/ui/views/controls/button/checkbox.h
index 7554cfd..35cdc25 100644
--- a/ui/views/controls/button/checkbox.h
+++ b/ui/views/controls/button/checkbox.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_CHECKBOX_H_
 #define UI_VIEWS_CONTROLS_BUTTON_CHECKBOX_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/button/custom_button.h b/ui/views/controls/button/custom_button.h
index 0d30ee4..5b2df32 100644
--- a/ui/views/controls/button/custom_button.h
+++ b/ui/views/controls/button/custom_button.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_
-#pragma once
 
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/base/events.h"
diff --git a/ui/views/controls/button/image_button.h b/ui/views/controls/button/image_button.h
index 5d1ae01..4ec203b 100644
--- a/ui/views/controls/button/image_button.h
+++ b/ui/views/controls/button/image_button.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_IMAGE_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_IMAGE_BUTTON_H_
-#pragma once
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/views/controls/button/menu_button.h b/ui/views/controls/button/menu_button.h
index 50c32fe..857a31d 100644
--- a/ui/views/controls/button/menu_button.h
+++ b/ui/views/controls/button/menu_button.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/button/menu_button_listener.h b/ui/views/controls/button/menu_button_listener.h
index 91d999a..5a20697 100644
--- a/ui/views/controls/button/menu_button_listener.h
+++ b/ui/views/controls/button/menu_button_listener.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_MENU_BUTTON_LISTENER_H_
 #define UI_VIEWS_CONTROLS_BUTTON_MENU_BUTTON_LISTENER_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/controls/button/radio_button.h b/ui/views/controls/button/radio_button.h
index 2fa9a97..9c23562 100644
--- a/ui/views/controls/button/radio_button.h
+++ b/ui/views/controls/button/radio_button.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_RADIO_BUTTON_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/views/controls/button/checkbox.h"
diff --git a/ui/views/controls/button/text_button.h b/ui/views/controls/button/text_button.h
index ba78db1..9b59da3 100644
--- a/ui/views/controls/button/text_button.h
+++ b/ui/views/controls/button/text_button.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_TEXT_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_TEXT_BUTTON_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/combobox/combobox.h b/ui/views/controls/combobox/combobox.h
index 570af1c..4f235ba 100644
--- a/ui/views/controls/combobox/combobox.h
+++ b/ui/views/controls/combobox/combobox.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_COMBOBOX_COMBOBOX_H_
 #define UI_VIEWS_CONTROLS_COMBOBOX_COMBOBOX_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/combobox/combobox_listener.h b/ui/views/controls/combobox/combobox_listener.h
index a81c579..987f4f4 100644
--- a/ui/views/controls/combobox/combobox_listener.h
+++ b/ui/views/controls/combobox/combobox_listener.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_COMBOBOX_COMBOBOX_LISTENER_H_
 #define UI_VIEWS_CONTROLS_COMBOBOX_COMBOBOX_LISTENER_H_
-#pragma once
 
 namespace views {
 
diff --git a/ui/views/controls/combobox/native_combobox_views.h b/ui/views/controls/combobox/native_combobox_views.h
index 83f1402..dac855f 100644
--- a/ui/views/controls/combobox/native_combobox_views.h
+++ b/ui/views/controls/combobox/native_combobox_views.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_COMBOBOX_NATIVE_COMBOBOX_VIEWS_H_
 #define UI_VIEWS_CONTROLS_COMBOBOX_NATIVE_COMBOBOX_VIEWS_H_
-#pragma once
 
 #include "ui/views/controls/combobox/native_combobox_wrapper.h"
 #include "ui/views/controls/menu/menu_delegate.h"
diff --git a/ui/views/controls/combobox/native_combobox_win.h b/ui/views/controls/combobox/native_combobox_win.h
index cc933ee..a7dbcba 100644
--- a/ui/views/controls/combobox/native_combobox_win.h
+++ b/ui/views/controls/combobox/native_combobox_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_COMBOBOX_NATIVE_COMBOBOX_WIN_H_
 #define UI_VIEWS_CONTROLS_COMBOBOX_NATIVE_COMBOBOX_WIN_H_
-#pragma once
 
 #include "ui/views/controls/combobox/native_combobox_wrapper.h"
 #include "ui/views/controls/native_control_win.h"
diff --git a/ui/views/controls/combobox/native_combobox_wrapper.h b/ui/views/controls/combobox/native_combobox_wrapper.h
index 5b7be8b..9e6adc0 100644
--- a/ui/views/controls/combobox/native_combobox_wrapper.h
+++ b/ui/views/controls/combobox/native_combobox_wrapper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_COMBOBOX_NATIVE_COMBOBOX_WRAPPER_H_
 #define UI_VIEWS_CONTROLS_COMBOBOX_NATIVE_COMBOBOX_WRAPPER_H_
-#pragma once
 
 #include "ui/gfx/native_widget_types.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/controls/focusable_border.h b/ui/views/controls/focusable_border.h
index 4b64bc6..c4f0168 100644
--- a/ui/views/controls/focusable_border.h
+++ b/ui/views/controls/focusable_border.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_FOCUSABLE_BORDER_H_
 #define UI_VIEWS_CONTROLS_FOCUSABLE_BORDER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/controls/glow_hover_controller.h b/ui/views/controls/glow_hover_controller.h
index ea71252..1c75d4f 100644
--- a/ui/views/controls/glow_hover_controller.h
+++ b/ui/views/controls/glow_hover_controller.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_GLOW_HOVER_CONTROLLER_H_
 #define UI_VIEWS_CONTROLS_GLOW_HOVER_CONTROLLER_H_
-#pragma once
 
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/base/animation/slide_animation.h"
diff --git a/ui/views/controls/image_view.h b/ui/views/controls/image_view.h
index 5aa1553..c00d536 100644
--- a/ui/views/controls/image_view.h
+++ b/ui/views/controls/image_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_IMAGE_VIEW_H_
 #define UI_VIEWS_CONTROLS_IMAGE_VIEW_H_
-#pragma once
 
 #include "ui/gfx/image/image_skia.h"
 #include "ui/views/view.h"
diff --git a/ui/views/controls/label.h b/ui/views/controls/label.h
index 5237025..4be47262 100644
--- a/ui/views/controls/label.h
+++ b/ui/views/controls/label.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_LABEL_H_
 #define UI_VIEWS_CONTROLS_LABEL_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/link.h b/ui/views/controls/link.h
index 88fcd18..269b539 100644
--- a/ui/views/controls/link.h
+++ b/ui/views/controls/link.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_LINK_H_
 #define UI_VIEWS_CONTROLS_LINK_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/link_listener.h b/ui/views/controls/link_listener.h
index 3ae3475..67162b0 100644
--- a/ui/views/controls/link_listener.h
+++ b/ui/views/controls/link_listener.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_LINK_LISTENER_H_
 #define UI_VIEWS_CONTROLS_LINK_LISTENER_H_
-#pragma once
 
 namespace views {
 
diff --git a/ui/views/controls/menu/menu.h b/ui/views/controls/menu/menu.h
index 2ec9d36..323657b 100644
--- a/ui/views/controls/menu/menu.h
+++ b/ui/views/controls/menu/menu.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/menu/menu_2.h b/ui/views/controls/menu/menu_2.h
index 87d1ca0..cfda9f4 100644
--- a/ui/views/controls/menu/menu_2.h
+++ b/ui/views/controls/menu/menu_2.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_2_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_2_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/views/controls/menu/menu_config.h b/ui/views/controls/menu/menu_config.h
index 1306dae..7cfd5c0 100644
--- a/ui/views/controls/menu/menu_config.h
+++ b/ui/views/controls/menu/menu_config.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_CONFIG_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_CONFIG_H_
-#pragma once
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/font.h"
diff --git a/ui/views/controls/menu/menu_controller.h b/ui/views/controls/menu/menu_controller.h
index dda986a..45d70ca 100644
--- a/ui/views/controls/menu/menu_controller.h
+++ b/ui/views/controls/menu/menu_controller.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_H_
-#pragma once
 
 #include "build/build_config.h"
 
diff --git a/ui/views/controls/menu/menu_controller_delegate.h b/ui/views/controls/menu/menu_controller_delegate.h
index 9d31c95..6472aea 100644
--- a/ui/views/controls/menu/menu_controller_delegate.h
+++ b/ui/views/controls/menu/menu_controller_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_DELEGATE_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_DELEGATE_H_
-#pragma once
 
 namespace views {
 
diff --git a/ui/views/controls/menu/menu_delegate.h b/ui/views/controls/menu/menu_delegate.h
index 501b049..c2c64f6 100644
--- a/ui/views/controls/menu/menu_delegate.h
+++ b/ui/views/controls/menu/menu_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_DELEGATE_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_DELEGATE_H_
-#pragma once
 
 #include <set>
 #include <string>
diff --git a/ui/views/controls/menu/menu_host.h b/ui/views/controls/menu/menu_host.h
index d1cd678..dbf8a7e 100644
--- a/ui/views/controls/menu/menu_host.h
+++ b/ui/views/controls/menu/menu_host.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_HOST_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_HOST_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/gfx/rect.h"
diff --git a/ui/views/controls/menu/menu_host_root_view.h b/ui/views/controls/menu/menu_host_root_view.h
index 1af721c..9e1774a 100644
--- a/ui/views/controls/menu/menu_host_root_view.h
+++ b/ui/views/controls/menu/menu_host_root_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_HOST_ROOT_VIEW_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_HOST_ROOT_VIEW_H_
-#pragma once
 
 #include "ui/views/widget/root_view.h"
 
diff --git a/ui/views/controls/menu/menu_image_util.h b/ui/views/controls/menu/menu_image_util.h
index 5e1062c..df79676 100644
--- a/ui/views/controls/menu/menu_image_util.h
+++ b/ui/views/controls/menu/menu_image_util.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_IMAGE_UTIL_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_IMAGE_UTIL_H_
-#pragma once
 
 namespace gfx {
 class ImageSkia;
diff --git a/ui/views/controls/menu/menu_item_view.h b/ui/views/controls/menu/menu_item_view.h
index 8185c43..03ef36e 100644
--- a/ui/views/controls/menu/menu_item_view.h
+++ b/ui/views/controls/menu/menu_item_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/views/controls/menu/menu_listener.h b/ui/views/controls/menu/menu_listener.h
index 9027a16..19cfb68 100644
--- a/ui/views/controls/menu/menu_listener.h
+++ b/ui/views/controls/menu/menu_listener.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_LISTENER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_LISTENER_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/controls/menu/menu_model_adapter.h b/ui/views/controls/menu/menu_model_adapter.h
index 8397d94..46fbb9c 100644
--- a/ui/views/controls/menu/menu_model_adapter.h
+++ b/ui/views/controls/menu/menu_model_adapter.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_MODEL_ADAPTER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_MODEL_ADAPTER_H_
-#pragma once
 
 #include <map>
 
diff --git a/ui/views/controls/menu/menu_runner.h b/ui/views/controls/menu/menu_runner.h
index eb83d53..cbb380f 100644
--- a/ui/views/controls/menu/menu_runner.h
+++ b/ui/views/controls/menu/menu_runner.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_RUNNER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_RUNNER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/controls/menu/menu_scroll_view_container.h b/ui/views/controls/menu/menu_scroll_view_container.h
index 234c8f1..209d8f9 100644
--- a/ui/views/controls/menu/menu_scroll_view_container.h
+++ b/ui/views/controls/menu/menu_scroll_view_container.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_
-#pragma once
 
 #include "ui/views/view.h"
 
diff --git a/ui/views/controls/menu/menu_separator.h b/ui/views/controls/menu/menu_separator.h
index d404ddb..f3eabb2 100644
--- a/ui/views/controls/menu/menu_separator.h
+++ b/ui/views/controls/menu/menu_separator.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_SEPARATOR_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_SEPARATOR_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/views/view.h"
diff --git a/ui/views/controls/menu/menu_win.h b/ui/views/controls/menu/menu_win.h
index dd12a64..284f26a 100644
--- a/ui/views/controls/menu/menu_win.h
+++ b/ui/views/controls/menu/menu_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_WIN_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_WIN_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/views/controls/menu/menu_wrapper.h b/ui/views/controls/menu/menu_wrapper.h
index 50edfdb..b2590ff 100644
--- a/ui/views/controls/menu/menu_wrapper.h
+++ b/ui/views/controls/menu/menu_wrapper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_WRAPPER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_WRAPPER_H_
-#pragma once
 
 #include "ui/gfx/native_widget_types.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/controls/menu/native_menu_host.h b/ui/views/controls/menu/native_menu_host.h
index 789f6f6..9ff8167 100644
--- a/ui/views/controls/menu/native_menu_host.h
+++ b/ui/views/controls/menu/native_menu_host.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_NATIVE_MENU_HOST_H_
 #define UI_VIEWS_CONTROLS_MENU_NATIVE_MENU_HOST_H_
-#pragma once
 
 #include "ui/gfx/native_widget_types.h"
 
diff --git a/ui/views/controls/menu/native_menu_host_delegate.h b/ui/views/controls/menu/native_menu_host_delegate.h
index 592cf6c..6e58fb1 100644
--- a/ui/views/controls/menu/native_menu_host_delegate.h
+++ b/ui/views/controls/menu/native_menu_host_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_NATIVE_MENU_HOST_DELEGATE_H_
 #define UI_VIEWS_CONTROLS_MENU_NATIVE_MENU_HOST_DELEGATE_H_
-#pragma once
 namespace views {
 
 class MenuHost;
diff --git a/ui/views/controls/menu/native_menu_win.h b/ui/views/controls/menu/native_menu_win.h
index c4b5543..02aedc4 100644
--- a/ui/views/controls/menu/native_menu_win.h
+++ b/ui/views/controls/menu/native_menu_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_NATIVE_MENU_WIN_H_
 #define UI_VIEWS_CONTROLS_MENU_NATIVE_MENU_WIN_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/views/controls/menu/submenu_view.h b/ui/views/controls/menu/submenu_view.h
index ec32a8b..9287358 100644
--- a/ui/views/controls/menu/submenu_view.h
+++ b/ui/views/controls/menu/submenu_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MENU_SUBMENU_VIEW_H_
 #define UI_VIEWS_CONTROLS_MENU_SUBMENU_VIEW_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/message_box_view.h b/ui/views/controls/message_box_view.h
index c492155..249182a 100644
--- a/ui/views/controls/message_box_view.h
+++ b/ui/views/controls/message_box_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_MESSAGE_BOX_VIEW_H_
 #define UI_VIEWS_CONTROLS_MESSAGE_BOX_VIEW_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/views/controls/native/native_view_host.h b/ui/views/controls/native/native_view_host.h
index 52575f0..4aa3d85 100644
--- a/ui/views/controls/native/native_view_host.h
+++ b/ui/views/controls/native/native_view_host.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_H_
 #define UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/native/native_view_host_aura.h b/ui/views/controls/native/native_view_host_aura.h
index 379ce23..79ab4a0 100644
--- a/ui/views/controls/native/native_view_host_aura.h
+++ b/ui/views/controls/native/native_view_host_aura.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_
 #define UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/controls/native/native_view_host_win.h b/ui/views/controls/native/native_view_host_win.h
index 5316c82..bf0cc24 100644
--- a/ui/views/controls/native/native_view_host_win.h
+++ b/ui/views/controls/native/native_view_host_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WIN_H_
 #define UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WIN_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/views/controls/native/native_view_host_wrapper.h"
diff --git a/ui/views/controls/native/native_view_host_wrapper.h b/ui/views/controls/native/native_view_host_wrapper.h
index 344a586..2ee43440 100644
--- a/ui/views/controls/native/native_view_host_wrapper.h
+++ b/ui/views/controls/native/native_view_host_wrapper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
 #define UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
-#pragma once
 
 #include "ui/gfx/native_widget_types.h"
 
diff --git a/ui/views/controls/native_control.h b/ui/views/controls/native_control.h
index f439d3f..620a467 100644
--- a/ui/views/controls/native_control.h
+++ b/ui/views/controls/native_control.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_NATIVE_CONTROL_H_
 #define UI_VIEWS_CONTROLS_NATIVE_CONTROL_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/views/controls/native_control_win.h b/ui/views/controls/native_control_win.h
index f8a002b..ee2a338 100644
--- a/ui/views/controls/native_control_win.h
+++ b/ui/views/controls/native_control_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_NATIVE_CONTROL_WIN_H_
 #define UI_VIEWS_CONTROLS_NATIVE_CONTROL_WIN_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/controls/progress_bar.h b/ui/views/controls/progress_bar.h
index 10ce757..988b230 100644
--- a/ui/views/controls/progress_bar.h
+++ b/ui/views/controls/progress_bar.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_PROGRESS_BAR_H_
 #define UI_VIEWS_CONTROLS_PROGRESS_BAR_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/controls/resize_area.h b/ui/views/controls/resize_area.h
index 57c65ca..b33ada1 100644
--- a/ui/views/controls/resize_area.h
+++ b/ui/views/controls/resize_area.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_RESIZE_AREA_H_
 #define UI_VIEWS_CONTROLS_RESIZE_AREA_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/resize_area_delegate.h b/ui/views/controls/resize_area_delegate.h
index ad8b3bf..cc5e133 100644
--- a/ui/views/controls/resize_area_delegate.h
+++ b/ui/views/controls/resize_area_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_RESIZE_AREA_DELEGATE_H_
 #define UI_VIEWS_CONTROLS_RESIZE_AREA_DELEGATE_H_
-#pragma once
 
 namespace views {
 
diff --git a/ui/views/controls/scroll_view.h b/ui/views/controls/scroll_view.h
index 5d60c57..859df1a8 100644
--- a/ui/views/controls/scroll_view.h
+++ b/ui/views/controls/scroll_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SCROLL_VIEW_H_
 #define UI_VIEWS_CONTROLS_SCROLL_VIEW_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/scrollbar/base_scroll_bar.h b/ui/views/controls/scrollbar/base_scroll_bar.h
index 50af3c6..d6a35b3 100644
--- a/ui/views/controls/scrollbar/base_scroll_bar.h
+++ b/ui/views/controls/scrollbar/base_scroll_bar.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_H_
 #define UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_H_
-#pragma once
 
 #include "ui/views/context_menu_controller.h"
 #include "ui/views/controls/button/image_button.h"
diff --git a/ui/views/controls/scrollbar/base_scroll_bar_button.h b/ui/views/controls/scrollbar/base_scroll_bar_button.h
index ead66e3..fd783aa 100644
--- a/ui/views/controls/scrollbar/base_scroll_bar_button.h
+++ b/ui/views/controls/scrollbar/base_scroll_bar_button.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_BUTTON_H_
 #define UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_BUTTON_H_
-#pragma once
 
 #include "ui/views/controls/button/custom_button.h"
 
diff --git a/ui/views/controls/scrollbar/base_scroll_bar_thumb.h b/ui/views/controls/scrollbar/base_scroll_bar_thumb.h
index c7daf93..222815d 100644
--- a/ui/views/controls/scrollbar/base_scroll_bar_thumb.h
+++ b/ui/views/controls/scrollbar/base_scroll_bar_thumb.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_THUMB_H_
 #define UI_VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_THUMB_H_
-#pragma once
 
 #include "ui/gfx/size.h"
 #include "ui/views/controls/button/custom_button.h"
diff --git a/ui/views/controls/scrollbar/bitmap_scroll_bar.h b/ui/views/controls/scrollbar/bitmap_scroll_bar.h
index 10fd6d1..4d1f6b8 100644
--- a/ui/views/controls/scrollbar/bitmap_scroll_bar.h
+++ b/ui/views/controls/scrollbar/bitmap_scroll_bar.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SCROLLBAR_BITMAP_SCROLL_BAR_H_
 #define UI_VIEWS_CONTROLS_SCROLLBAR_BITMAP_SCROLL_BAR_H_
-#pragma once
 
 #include "ui/views/controls/scrollbar/base_scroll_bar.h"
 
diff --git a/ui/views/controls/scrollbar/native_scroll_bar.h b/ui/views/controls/scrollbar/native_scroll_bar.h
index 3a2c854..0ca2c68 100644
--- a/ui/views/controls/scrollbar/native_scroll_bar.h
+++ b/ui/views/controls/scrollbar/native_scroll_bar.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_H_
 #define UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/scrollbar/native_scroll_bar_views.h b/ui/views/controls/scrollbar/native_scroll_bar_views.h
index 0335e7f..93dc963 100644
--- a/ui/views/controls/scrollbar/native_scroll_bar_views.h
+++ b/ui/views/controls/scrollbar/native_scroll_bar_views.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_VIEWS_H_
 #define UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_VIEWS_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/base/native_theme/native_theme.h"
diff --git a/ui/views/controls/scrollbar/native_scroll_bar_win.h b/ui/views/controls/scrollbar/native_scroll_bar_win.h
index 1f7ec36..cb716af 100644
--- a/ui/views/controls/scrollbar/native_scroll_bar_win.h
+++ b/ui/views/controls/scrollbar/native_scroll_bar_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_WIN_H_
 #define UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_WIN_H_
-#pragma once
 
 #include "ui/views/controls/native_control_win.h"
 #include "ui/views/controls/scrollbar/native_scroll_bar_wrapper.h"
diff --git a/ui/views/controls/scrollbar/native_scroll_bar_wrapper.h b/ui/views/controls/scrollbar/native_scroll_bar_wrapper.h
index 7c94a0a..b0cbf49 100644
--- a/ui/views/controls/scrollbar/native_scroll_bar_wrapper.h
+++ b/ui/views/controls/scrollbar/native_scroll_bar_wrapper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_WRAPPER_H_
 #define UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_WRAPPER_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/controls/scrollbar/scroll_bar.h b/ui/views/controls/scrollbar/scroll_bar.h
index b34f4ed..2b4790b 100644
--- a/ui/views/controls/scrollbar/scroll_bar.h
+++ b/ui/views/controls/scrollbar/scroll_bar.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SCROLLBAR_SCROLL_BAR_H_
 #define UI_VIEWS_CONTROLS_SCROLLBAR_SCROLL_BAR_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/controls/separator.h b/ui/views/controls/separator.h
index 44df432..7980ea7 100644
--- a/ui/views/controls/separator.h
+++ b/ui/views/controls/separator.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SEPARATOR_H_
 #define UI_VIEWS_CONTROLS_SEPARATOR_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/single_split_view.h b/ui/views/controls/single_split_view.h
index 3853eaa..54d7f7b 100644
--- a/ui/views/controls/single_split_view.h
+++ b/ui/views/controls/single_split_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SINGLE_SPLIT_VIEW_H_
 #define UI_VIEWS_CONTROLS_SINGLE_SPLIT_VIEW_H_
-#pragma once
 
 #include "base/gtest_prod_util.h"
 #include "ui/views/view.h"
diff --git a/ui/views/controls/single_split_view_listener.h b/ui/views/controls/single_split_view_listener.h
index 580ac82..5c33c66 100644
--- a/ui/views/controls/single_split_view_listener.h
+++ b/ui/views/controls/single_split_view_listener.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SINGLE_SPLIT_VIEW_LISTENER_H_
 #define UI_VIEWS_CONTROLS_SINGLE_SPLIT_VIEW_LISTENER_H_
-#pragma once
 
 namespace views {
 
diff --git a/ui/views/controls/slider.h b/ui/views/controls/slider.h
index b85a600..4a69ef9 100644
--- a/ui/views/controls/slider.h
+++ b/ui/views/controls/slider.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_SLIDER_H_
 #define UI_VIEWS_CONTROLS_SLIDER_H_
-#pragma once
 
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/views/view.h"
diff --git a/ui/views/controls/tabbed_pane/native_tabbed_pane_views.h b/ui/views/controls/tabbed_pane/native_tabbed_pane_views.h
index 24df4bc..dc43bcf 100644
--- a/ui/views/controls/tabbed_pane/native_tabbed_pane_views.h
+++ b/ui/views/controls/tabbed_pane/native_tabbed_pane_views.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABBED_PANE_NATIVE_TABBED_PANE_VIEWS_H_
 #define UI_VIEWS_CONTROLS_TABBED_PANE_NATIVE_TABBED_PANE_VIEWS_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/views/controls/tabbed_pane/native_tabbed_pane_win.h b/ui/views/controls/tabbed_pane/native_tabbed_pane_win.h
index 6532438..fb3624c 100644
--- a/ui/views/controls/tabbed_pane/native_tabbed_pane_win.h
+++ b/ui/views/controls/tabbed_pane/native_tabbed_pane_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABBED_PANE_NATIVE_TABBED_PANE_WIN_H_
 #define UI_VIEWS_CONTROLS_TABBED_PANE_NATIVE_TABBED_PANE_WIN_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/views/controls/tabbed_pane/native_tabbed_pane_wrapper.h b/ui/views/controls/tabbed_pane/native_tabbed_pane_wrapper.h
index 90a651f..3abe7d0 100644
--- a/ui/views/controls/tabbed_pane/native_tabbed_pane_wrapper.h
+++ b/ui/views/controls/tabbed_pane/native_tabbed_pane_wrapper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABBED_PANE_NATIVE_TABBED_PANE_WRAPPER_H_
 #define UI_VIEWS_CONTROLS_TABBED_PANE_NATIVE_TABBED_PANE_WRAPPER_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/gfx/native_widget_types.h"
diff --git a/ui/views/controls/tabbed_pane/tabbed_pane.h b/ui/views/controls/tabbed_pane/tabbed_pane.h
index 64f3b0e..348acf6 100644
--- a/ui/views/controls/tabbed_pane/tabbed_pane.h
+++ b/ui/views/controls/tabbed_pane/tabbed_pane.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABBED_PANE_TABBED_PANE_H_
 #define UI_VIEWS_CONTROLS_TABBED_PANE_TABBED_PANE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/controls/tabbed_pane/tabbed_pane_listener.h b/ui/views/controls/tabbed_pane/tabbed_pane_listener.h
index 05df022..d260788 100644
--- a/ui/views/controls/tabbed_pane/tabbed_pane_listener.h
+++ b/ui/views/controls/tabbed_pane/tabbed_pane_listener.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABBED_PANE_TABBED_PANE_LISTENER_H_
 #define UI_VIEWS_CONTROLS_TABBED_PANE_TABBED_PANE_LISTENER_H_
-#pragma once
 
 namespace views {
 
diff --git a/ui/views/controls/table/group_table_model.h b/ui/views/controls/table/group_table_model.h
index 49e0b563..41a4687 100644
--- a/ui/views/controls/table/group_table_model.h
+++ b/ui/views/controls/table/group_table_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABLE_GROUP_TABLE_MODEL_H_
 #define UI_VIEWS_CONTROLS_TABLE_GROUP_TABLE_MODEL_H_
-#pragma once
 
 #include "ui/base/models/table_model.h"
 
diff --git a/ui/views/controls/table/group_table_view.h b/ui/views/controls/table/group_table_view.h
index 104a563..35256b1 100644
--- a/ui/views/controls/table/group_table_view.h
+++ b/ui/views/controls/table/group_table_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABLE_GROUP_TABLE_VIEW_H_
 #define UI_VIEWS_CONTROLS_TABLE_GROUP_TABLE_VIEW_H_
-#pragma once
 
 #if defined(OS_WIN) && !defined(USE_AURA)
 #include "ui/views/controls/table/group_table_view_win.h"
diff --git a/ui/views/controls/table/group_table_view_views.h b/ui/views/controls/table/group_table_view_views.h
index 246e02e..71d491f 100644
--- a/ui/views/controls/table/group_table_view_views.h
+++ b/ui/views/controls/table/group_table_view_views.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABLE_GROUP_TABLE_VIEW_VIEWS_H_
 #define UI_VIEWS_CONTROLS_TABLE_GROUP_TABLE_VIEW_VIEWS_H_
-#pragma once
 
 #include "ui/views/controls/table/table_view.h"
 
diff --git a/ui/views/controls/table/group_table_view_win.h b/ui/views/controls/table/group_table_view_win.h
index 34e6187..eb104fa 100644
--- a/ui/views/controls/table/group_table_view_win.h
+++ b/ui/views/controls/table/group_table_view_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABLE_GROUP_TABLE_VIEW_WIN_H_
 #define UI_VIEWS_CONTROLS_TABLE_GROUP_TABLE_VIEW_WIN_H_
-#pragma once
 
 #include "base/memory/weak_ptr.h"
 #include "ui/base/models/table_model.h"
diff --git a/ui/views/controls/table/table_view.h b/ui/views/controls/table/table_view.h
index f3f71fd..e334c44 100644
--- a/ui/views/controls/table/table_view.h
+++ b/ui/views/controls/table/table_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_H_
 #define UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_H_
-#pragma once
 
 #if defined(OS_WIN) && !defined(USE_AURA)
 #include "ui/views/controls/table/table_view_win.h"
diff --git a/ui/views/controls/table/table_view_observer.h b/ui/views/controls/table/table_view_observer.h
index 9bb67d8..f2eac1b 100644
--- a/ui/views/controls/table/table_view_observer.h
+++ b/ui/views/controls/table/table_view_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_OBSERVER_H_
 #define UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_OBSERVER_H_
-#pragma once
 
 #include "ui/base/keycodes/keyboard_codes.h"
 
diff --git a/ui/views/controls/table/table_view_views.h b/ui/views/controls/table/table_view_views.h
index b2565e2..11c6b7e 100644
--- a/ui/views/controls/table/table_view_views.h
+++ b/ui/views/controls/table/table_view_views.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_VIEWS_H_
 #define UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_VIEWS_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/views/controls/table/table_view_win.h b/ui/views/controls/table/table_view_win.h
index 5ca0f01..ae89a88 100644
--- a/ui/views/controls/table/table_view_win.h
+++ b/ui/views/controls/table/table_view_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_WIN_H_
 #define UI_VIEWS_CONTROLS_TABLE_TABLE_VIEW_WIN_H_
-#pragma once
 
 #include <map>
 #include <vector>
diff --git a/ui/views/controls/textfield/native_textfield_views.h b/ui/views/controls/textfield/native_textfield_views.h
index f0bb45c..f5ea868 100644
--- a/ui/views/controls/textfield/native_textfield_views.h
+++ b/ui/views/controls/textfield/native_textfield_views.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_VIEWS_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_VIEWS_H_
-#pragma once
 
 #include "base/memory/weak_ptr.h"
 #include "base/string16.h"
diff --git a/ui/views/controls/textfield/native_textfield_win.h b/ui/views/controls/textfield/native_textfield_win.h
index 3c5c59f..dfebcdb 100644
--- a/ui/views/controls/textfield/native_textfield_win.h
+++ b/ui/views/controls/textfield/native_textfield_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_WIN_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_WIN_H_
-#pragma once
 
 #include <atlbase.h>
 #include <atlapp.h>
diff --git a/ui/views/controls/textfield/native_textfield_wrapper.h b/ui/views/controls/textfield/native_textfield_wrapper.h
index 43ec803..43aed03 100644
--- a/ui/views/controls/textfield/native_textfield_wrapper.h
+++ b/ui/views/controls/textfield/native_textfield_wrapper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_WRAPPER_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_WRAPPER_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/gfx/native_widget_types.h"
diff --git a/ui/views/controls/textfield/textfield.h b/ui/views/controls/textfield/textfield.h
index 163a71b..39bc4a0 100644
--- a/ui/views/controls/textfield/textfield.h
+++ b/ui/views/controls/textfield/textfield.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/controls/textfield/textfield_controller.h b/ui/views/controls/textfield/textfield_controller.h
index a9471b1..bacf768 100644
--- a/ui/views/controls/textfield/textfield_controller.h
+++ b/ui/views/controls/textfield/textfield_controller.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_CONTROLLER_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_CONTROLLER_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/controls/textfield/textfield_views_model.h b/ui/views/controls/textfield/textfield_views_model.h
index 0e347db..94bf984 100644
--- a/ui/views/controls/textfield/textfield_views_model.h
+++ b/ui/views/controls/textfield/textfield_views_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_VIEWS_MODEL_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_VIEWS_MODEL_H_
-#pragma once
 
 #include <list>
 #include <vector>
diff --git a/ui/views/controls/throbber.h b/ui/views/controls/throbber.h
index 7fa6ea8..27652cf 100644
--- a/ui/views/controls/throbber.h
+++ b/ui/views/controls/throbber.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_THROBBER_H_
 #define UI_VIEWS_CONTROLS_THROBBER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/controls/tree/tree_view.h b/ui/views/controls/tree/tree_view.h
index c266c93..d3e8785 100644
--- a/ui/views/controls/tree/tree_view.h
+++ b/ui/views/controls/tree/tree_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TREE_TREE_VIEW_H_
 #define UI_VIEWS_CONTROLS_TREE_TREE_VIEW_H_
-#pragma once
 
 #if defined(OS_WIN) && !defined(USE_AURA)
 #include "ui/views/controls/tree/tree_view_win.h"
diff --git a/ui/views/controls/tree/tree_view_controller.h b/ui/views/controls/tree/tree_view_controller.h
index 2fe24f8..38e7fcc 100644
--- a/ui/views/controls/tree/tree_view_controller.h
+++ b/ui/views/controls/tree/tree_view_controller.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TREE_TREE_VIEW_CONTROLLER_H_
 #define UI_VIEWS_CONTROLS_TREE_TREE_VIEW_CONTROLLER_H_
-#pragma once
 
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/controls/tree/tree_view_views.h b/ui/views/controls/tree/tree_view_views.h
index 4eb6368..8088d3f 100644
--- a/ui/views/controls/tree/tree_view_views.h
+++ b/ui/views/controls/tree/tree_view_views.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TREE_TREE_VIEW_VIEWS_H_
 #define UI_VIEWS_CONTROLS_TREE_TREE_VIEW_VIEWS_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/views/controls/tree/tree_view_win.h b/ui/views/controls/tree/tree_view_win.h
index c5fef22..a6be08b 100644
--- a/ui/views/controls/tree/tree_view_win.h
+++ b/ui/views/controls/tree/tree_view_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_TREE_TREE_VIEW_WIN_H_
 #define UI_VIEWS_CONTROLS_TREE_TREE_VIEW_WIN_H_
-#pragma once
 
 #include <windows.h>
 #include <commctrl.h>
diff --git a/ui/views/controls/webview/webview.h b/ui/views/controls/webview/webview.h
index e36e92a..9d3426d 100644
--- a/ui/views/controls/webview/webview.h
+++ b/ui/views/controls/webview/webview.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_
 #define UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_
-#pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/notification_observer.h"
diff --git a/ui/views/debug_utils.h b/ui/views/debug_utils.h
index b953c94..4b998ce 100644
--- a/ui/views/debug_utils.h
+++ b/ui/views/debug_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_DEBUG_UTILS_H_
 #define UI_VIEWS_DEBUG_UTILS_H_
-#pragma once
 
 namespace views {
 
diff --git a/ui/views/drag_controller.h b/ui/views/drag_controller.h
index d9f3272..eace6a98 100644
--- a/ui/views/drag_controller.h
+++ b/ui/views/drag_controller.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_DRAG_CONTROLLER_H_
 #define UI_VIEWS_DRAG_CONTROLLER_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/drag_utils.h b/ui/views/drag_utils.h
index b30d130..068cda1 100644
--- a/ui/views/drag_utils.h
+++ b/ui/views/drag_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_DRAG_UTILS_H_
 #define UI_VIEWS_DRAG_UTILS_H_
-#pragma once
 
 #include "ui/gfx/native_widget_types.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/events/event.h b/ui/views/events/event.h
index 44ef1b6..e0badca 100644
--- a/ui/views/events/event.h
+++ b/ui/views/events/event.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EVENTS_EVENT_H_
 #define UI_VIEWS_EVENTS_EVENT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/bubble_example.h b/ui/views/examples/bubble_example.h
index c4f0cd6..ddb0549 100644
--- a/ui/views/examples/bubble_example.h
+++ b/ui/views/examples/bubble_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_BUBBLE_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_BUBBLE_EXAMPLE_H_
-#pragma once
 
 #include "ui/views/controls/button/button.h"
 #include "ui/views/examples/example_base.h"
diff --git a/ui/views/examples/button_example.h b/ui/views/examples/button_example.h
index 55f4685..59973f5 100644
--- a/ui/views/examples/button_example.h
+++ b/ui/views/examples/button_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_BUTTON_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_BUTTON_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/combobox_example.h b/ui/views/examples/combobox_example.h
index f8d5a79..263782d 100644
--- a/ui/views/examples/combobox_example.h
+++ b/ui/views/examples/combobox_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_COMBOBOX_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_COMBOBOX_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/content_client/examples_browser_main_parts.h b/ui/views/examples/content_client/examples_browser_main_parts.h
index dacb672..67bc25e 100644
--- a/ui/views/examples/content_client/examples_browser_main_parts.h
+++ b/ui/views/examples/content_client/examples_browser_main_parts.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_CONTENT_CLIENT_EXAMPLES_BROWSER_MAIN_PARTS_H_
 #define UI_VIEWS_EXAMPLES_CONTENT_CLIENT_EXAMPLES_BROWSER_MAIN_PARTS_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/views/examples/content_client/examples_content_browser_client.h b/ui/views/examples/content_client/examples_content_browser_client.h
index 90d414e..8e9ce70 100644
--- a/ui/views/examples/content_client/examples_content_browser_client.h
+++ b/ui/views/examples/content_client/examples_content_browser_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_CONTENT_CLIENT_EXAMPLES_CONTENT_BROWSER_CLIENT_H_
 #define UI_VIEWS_EXAMPLES_CONTENT_CLIENT_EXAMPLES_CONTENT_BROWSER_CLIENT_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/examples/content_client/examples_main_delegate.h b/ui/views/examples/content_client/examples_main_delegate.h
index 750a3ff..23135be 100644
--- a/ui/views/examples/content_client/examples_main_delegate.h
+++ b/ui/views/examples/content_client/examples_main_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_CONTENT_CLIENT_EXAMPLES_MAIN_DELEGATE_H_
 #define UI_VIEWS_EXAMPLES_CONTENT_CLIENT_EXAMPLES_MAIN_DELEGATE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/examples/double_split_view_example.h b/ui/views/examples/double_split_view_example.h
index 7b24aad..7fbae46 100644
--- a/ui/views/examples/double_split_view_example.h
+++ b/ui/views/examples/double_split_view_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_DOUBLE_SPLIT_VIEW_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_DOUBLE_SPLIT_VIEW_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/example_base.h b/ui/views/examples/example_base.h
index f3abd99..f28fdef 100644
--- a/ui/views/examples/example_base.h
+++ b/ui/views/examples/example_base.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_EXAMPLE_BASE_H_
 #define UI_VIEWS_EXAMPLES_EXAMPLE_BASE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/examples/example_combobox_model.h b/ui/views/examples/example_combobox_model.h
index 1437401..74262d8 100644
--- a/ui/views/examples/example_combobox_model.h
+++ b/ui/views/examples/example_combobox_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_EXAMPLE_COMBOBOX_MODEL_H_
 #define UI_VIEWS_EXAMPLES_EXAMPLE_COMBOBOX_MODEL_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/examples_window.h b/ui/views/examples/examples_window.h
index cdfe2be..d3ef045 100644
--- a/ui/views/examples/examples_window.h
+++ b/ui/views/examples/examples_window.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_EXAMPLES_WINDOW_H_
 #define UI_VIEWS_EXAMPLES_EXAMPLES_WINDOW_H_
-#pragma once
 
 namespace content {
 class BrowserContext;
diff --git a/ui/views/examples/link_example.h b/ui/views/examples/link_example.h
index 396cc2b..505f4ed 100644
--- a/ui/views/examples/link_example.h
+++ b/ui/views/examples/link_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_LINK_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_LINK_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/menu_example.h b/ui/views/examples/menu_example.h
index 3ee5ec2..40c9b23 100644
--- a/ui/views/examples/menu_example.h
+++ b/ui/views/examples/menu_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_MENU_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_MENU_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/message_box_example.h b/ui/views/examples/message_box_example.h
index 70fd678..0d915de4 100644
--- a/ui/views/examples/message_box_example.h
+++ b/ui/views/examples/message_box_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_MESSAGE_BOX_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_MESSAGE_BOX_EXAMPLE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/examples/native_theme_button_example.h b/ui/views/examples/native_theme_button_example.h
index 2bc940c..179439b 100644
--- a/ui/views/examples/native_theme_button_example.h
+++ b/ui/views/examples/native_theme_button_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_NATIVE_THEME_BUTTON_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_NATIVE_THEME_BUTTON_EXAMPLE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/examples/native_theme_checkbox_example.h b/ui/views/examples/native_theme_checkbox_example.h
index 9df0ef5..8cb9ba1 100644
--- a/ui/views/examples/native_theme_checkbox_example.h
+++ b/ui/views/examples/native_theme_checkbox_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_NATIVE_THEME_CHECKBOX_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_NATIVE_THEME_CHECKBOX_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/base/native_theme/native_theme.h"
diff --git a/ui/views/examples/progress_bar_example.h b/ui/views/examples/progress_bar_example.h
index d9229d8..a2fdcd9a 100644
--- a/ui/views/examples/progress_bar_example.h
+++ b/ui/views/examples/progress_bar_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_PROGRESS_BAR_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_PROGRESS_BAR_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/radio_button_example.h b/ui/views/examples/radio_button_example.h
index 79b83d6..49deec8 100644
--- a/ui/views/examples/radio_button_example.h
+++ b/ui/views/examples/radio_button_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_RADIO_BUTTON_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_RADIO_BUTTON_EXAMPLE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/examples/scroll_view_example.h b/ui/views/examples/scroll_view_example.h
index d18eac9..e57fc79 100644
--- a/ui/views/examples/scroll_view_example.h
+++ b/ui/views/examples/scroll_view_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_SCROLL_VIEW_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_SCROLL_VIEW_EXAMPLE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/examples/single_split_view_example.h b/ui/views/examples/single_split_view_example.h
index c3a95be..0c157cc 100644
--- a/ui/views/examples/single_split_view_example.h
+++ b/ui/views/examples/single_split_view_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_SINGLE_SPLIT_VIEW_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_SINGLE_SPLIT_VIEW_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/slider_example.h b/ui/views/examples/slider_example.h
index 33edcdd..25ca9eb 100644
--- a/ui/views/examples/slider_example.h
+++ b/ui/views/examples/slider_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_SLIDER_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_SLIDER_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/tabbed_pane_example.h b/ui/views/examples/tabbed_pane_example.h
index 1b9c96e..43ff22c 100644
--- a/ui/views/examples/tabbed_pane_example.h
+++ b/ui/views/examples/tabbed_pane_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_TABBED_PANE_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_TABBED_PANE_EXAMPLE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/examples/table_example.h b/ui/views/examples/table_example.h
index 33f1cde..db7d901 100644
--- a/ui/views/examples/table_example.h
+++ b/ui/views/examples/table_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_TABLE_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_TABLE_EXAMPLE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/examples/text_example.h b/ui/views/examples/text_example.h
index 7b2e1e5..b814b4d 100644
--- a/ui/views/examples/text_example.h
+++ b/ui/views/examples/text_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_TEXT_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_TEXT_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/textfield_example.h b/ui/views/examples/textfield_example.h
index 19b8c09a8..cfa5634 100644
--- a/ui/views/examples/textfield_example.h
+++ b/ui/views/examples/textfield_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_TEXTFIELD_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_TEXTFIELD_EXAMPLE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/examples/throbber_example.h b/ui/views/examples/throbber_example.h
index 3454dd5..cdd0d6d 100644
--- a/ui/views/examples/throbber_example.h
+++ b/ui/views/examples/throbber_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_THROBBER_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_THROBBER_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/tree_view_example.h b/ui/views/examples/tree_view_example.h
index 4709091..b2f1ea9 100644
--- a/ui/views/examples/tree_view_example.h
+++ b/ui/views/examples/tree_view_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_TREE_VIEW_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_TREE_VIEW_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/webview_example.h b/ui/views/examples/webview_example.h
index 444b7f4..bc4e459 100644
--- a/ui/views/examples/webview_example.h
+++ b/ui/views/examples/webview_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_WEBVIEW_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_WEBVIEW_EXAMPLE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/examples/widget_example.h b/ui/views/examples/widget_example.h
index 01ea140..fe32887d 100644
--- a/ui/views/examples/widget_example.h
+++ b/ui/views/examples/widget_example.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_EXAMPLES_WIDGET_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_WIDGET_EXAMPLE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/focus/accelerator_handler.h b/ui/views/focus/accelerator_handler.h
index a79fc02..95edaea 100644
--- a/ui/views/focus/accelerator_handler.h
+++ b/ui/views/focus/accelerator_handler.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_FOCUS_ACCELERATOR_HANDLER_H_
 #define UI_VIEWS_FOCUS_ACCELERATOR_HANDLER_H_
-#pragma once
 
 #include "build/build_config.h"
 
diff --git a/ui/views/focus/external_focus_tracker.h b/ui/views/focus/external_focus_tracker.h
index 2b0b4c2..e1e3ce8 100644
--- a/ui/views/focus/external_focus_tracker.h
+++ b/ui/views/focus/external_focus_tracker.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_FOCUS_EXTERNAL_FOCUS_TRACKER_H_
 #define UI_VIEWS_FOCUS_EXTERNAL_FOCUS_TRACKER_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/views/focus/focus_manager.h"
diff --git a/ui/views/focus/focus_manager.h b/ui/views/focus/focus_manager.h
index e25c3ff..cbd7583 100644
--- a/ui/views/focus/focus_manager.h
+++ b/ui/views/focus/focus_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_FOCUS_FOCUS_MANAGER_H_
 #define UI_VIEWS_FOCUS_FOCUS_MANAGER_H_
-#pragma once
 
 #include <list>
 #include <map>
diff --git a/ui/views/focus/focus_manager_delegate.h b/ui/views/focus/focus_manager_delegate.h
index 1763ed2..ca9bd71 100644
--- a/ui/views/focus/focus_manager_delegate.h
+++ b/ui/views/focus/focus_manager_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_FOCUS_FOCUS_MANAGER_DELEGATE_H_
 #define UI_VIEWS_FOCUS_FOCUS_MANAGER_DELEGATE_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/focus/focus_manager_factory.h b/ui/views/focus/focus_manager_factory.h
index d8da709..b808fec 100644
--- a/ui/views/focus/focus_manager_factory.h
+++ b/ui/views/focus/focus_manager_factory.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_FOCUS_FOCUS_MANAGER_FACTORY_H_
 #define UI_VIEWS_FOCUS_FOCUS_MANAGER_FACTORY_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/focus/focus_search.h b/ui/views/focus/focus_search.h
index 3f938d6..345a6cc 100644
--- a/ui/views/focus/focus_search.h
+++ b/ui/views/focus/focus_search.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_FOCUS_FOCUS_SEARCH_H_
 #define UI_VIEWS_FOCUS_FOCUS_SEARCH_H_
-#pragma once
 
 #include "ui/views/view.h"
 
diff --git a/ui/views/focus/view_storage.h b/ui/views/focus/view_storage.h
index 80ea032..fbfceea 100644
--- a/ui/views/focus/view_storage.h
+++ b/ui/views/focus/view_storage.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_FOCUS_VIEW_STORAGE_H_
 #define UI_VIEWS_FOCUS_VIEW_STORAGE_H_
-#pragma once
 
 #include "base/memory/singleton.h"
 #include "ui/views/view.h"
diff --git a/ui/views/focus/widget_focus_manager.h b/ui/views/focus/widget_focus_manager.h
index c36584b..6d2036c 100644
--- a/ui/views/focus/widget_focus_manager.h
+++ b/ui/views/focus/widget_focus_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_FOCUS_WIDGET_FOCUS_MANAGER_H_
 #define UI_VIEWS_FOCUS_WIDGET_FOCUS_MANAGER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
diff --git a/ui/views/ime/input_method.h b/ui/views/ime/input_method.h
index e54879f..9a7b891 100644
--- a/ui/views/ime/input_method.h
+++ b/ui/views/ime/input_method.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_IME_INPUT_METHOD_H_
 #define UI_VIEWS_IME_INPUT_METHOD_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/ime/input_method_base.h b/ui/views/ime/input_method_base.h
index 3d0b67b..147f5c8 100644
--- a/ui/views/ime/input_method_base.h
+++ b/ui/views/ime/input_method_base.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_IME_INPUT_METHOD_BASE_H_
 #define UI_VIEWS_IME_INPUT_METHOD_BASE_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/ime/input_method_bridge.h b/ui/views/ime/input_method_bridge.h
index 9246a91..f0b7da5 100644
--- a/ui/views/ime/input_method_bridge.h
+++ b/ui/views/ime/input_method_bridge.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_IME_INPUT_METHOD_BRIDGE_H_
 #define UI_VIEWS_IME_INPUT_METHOD_BRIDGE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/ime/input_method_delegate.h b/ui/views/ime/input_method_delegate.h
index d1a87ee..7c6b96a 100644
--- a/ui/views/ime/input_method_delegate.h
+++ b/ui/views/ime/input_method_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_IME_INPUT_METHOD_DELEGATE_H_
 #define UI_VIEWS_IME_INPUT_METHOD_DELEGATE_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/ime/input_method_win.h b/ui/views/ime/input_method_win.h
index 2be706c..ca49697 100644
--- a/ui/views/ime/input_method_win.h
+++ b/ui/views/ime/input_method_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_IME_INPUT_METHOD_WIN_H_
 #define UI_VIEWS_IME_INPUT_METHOD_WIN_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/views/ime/mock_input_method.h b/ui/views/ime/mock_input_method.h
index 1fe432e..c39a406 100644
--- a/ui/views/ime/mock_input_method.h
+++ b/ui/views/ime/mock_input_method.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_IME_MOCK_INPUT_METHOD_H_
 #define UI_VIEWS_IME_MOCK_INPUT_METHOD_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/layout/box_layout.h b/ui/views/layout/box_layout.h
index a2231a0..b592cc6 100644
--- a/ui/views/layout/box_layout.h
+++ b/ui/views/layout/box_layout.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_LAYOUT_BOX_LAYOUT_H_
 #define UI_VIEWS_LAYOUT_BOX_LAYOUT_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/layout/fill_layout.h b/ui/views/layout/fill_layout.h
index 59a3f5d..4189edf 100644
--- a/ui/views/layout/fill_layout.h
+++ b/ui/views/layout/fill_layout.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_LAYOUT_FILL_LAYOUT_H_
 #define UI_VIEWS_LAYOUT_FILL_LAYOUT_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/views/layout/layout_manager.h"
diff --git a/ui/views/layout/grid_layout.h b/ui/views/layout/grid_layout.h
index a86c299..43f613a 100644
--- a/ui/views/layout/grid_layout.h
+++ b/ui/views/layout/grid_layout.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_LAYOUT_GRID_LAYOUT_H_
 #define UI_VIEWS_LAYOUT_GRID_LAYOUT_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/views/layout/layout_constants.h b/ui/views/layout/layout_constants.h
index 72e8c35..07e12ba 100644
--- a/ui/views/layout/layout_constants.h
+++ b/ui/views/layout/layout_constants.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_LAYOUT_LAYOUT_CONSTANTS_H_
 #define UI_VIEWS_LAYOUT_LAYOUT_CONSTANTS_H_
-#pragma once
 
 // This file contains some constants we use to implement our standard panel
 // layout.
diff --git a/ui/views/layout/layout_manager.h b/ui/views/layout/layout_manager.h
index 4633544..f678e72 100644
--- a/ui/views/layout/layout_manager.h
+++ b/ui/views/layout/layout_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_LAYOUT_LAYOUT_MANAGER_H_
 #define UI_VIEWS_LAYOUT_LAYOUT_MANAGER_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/metrics.h b/ui/views/metrics.h
index 62f2476..0331ae1 100644
--- a/ui/views/metrics.h
+++ b/ui/views/metrics.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_METRICS_H_
 #define UI_VIEWS_METRICS_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/mouse_watcher.h b/ui/views/mouse_watcher.h
index fc5213a..b976cc6 100644
--- a/ui/views/mouse_watcher.h
+++ b/ui/views/mouse_watcher.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_MOUSE_WATCHER_H_
 #define UI_VIEWS_MOUSE_WATCHER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
diff --git a/ui/views/mouse_watcher_view_host.h b/ui/views/mouse_watcher_view_host.h
index fcba9a6..f19aa8f 100644
--- a/ui/views/mouse_watcher_view_host.h
+++ b/ui/views/mouse_watcher_view_host.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_MOUSE_WATCHER_VIEW_HOST_H_
 #define UI_VIEWS_MOUSE_WATCHER_VIEW_HOST_H_
-#pragma once
 
 #include "ui/views/mouse_watcher.h"
 
diff --git a/ui/views/native_theme_delegate.h b/ui/views/native_theme_delegate.h
index 9f2945d..b14a62a 100644
--- a/ui/views/native_theme_delegate.h
+++ b/ui/views/native_theme_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_NATIVE_THEME_DELEGATE_H_
 #define UI_VIEWS_NATIVE_THEME_DELEGATE_H_
-#pragma once
 
 #include "ui/base/native_theme/native_theme.h"
 #include "ui/gfx/rect.h"
diff --git a/ui/views/native_theme_painter.h b/ui/views/native_theme_painter.h
index 1dcb75f..e08810d 100644
--- a/ui/views/native_theme_painter.h
+++ b/ui/views/native_theme_painter.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_NATIVE_THEME_PAINTER_H_
 #define UI_VIEWS_NATIVE_THEME_PAINTER_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/views/painter.h"
diff --git a/ui/views/paint_lock.h b/ui/views/paint_lock.h
index 2399419..4fd3215 100644
--- a/ui/views/paint_lock.h
+++ b/ui/views/paint_lock.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_PAINT_LOCK_H_
 #define UI_VIEWS_PAINT_LOCK_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/painter.h b/ui/views/painter.h
index 85f7214..a49cd1b 100644
--- a/ui/views/painter.h
+++ b/ui/views/painter.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_PAINTER_H_
 #define UI_VIEWS_PAINTER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/repeat_controller.h b/ui/views/repeat_controller.h
index 1efe50e4..26fda6f 100644
--- a/ui/views/repeat_controller.h
+++ b/ui/views/repeat_controller.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_REPEAT_CONTROLLER_H_
 #define UI_VIEWS_REPEAT_CONTROLLER_H_
-#pragma once
 
 #include "base/callback.h"
 #include "base/timer.h"
diff --git a/ui/views/test/test_tooltip_client.h b/ui/views/test/test_tooltip_client.h
index f6502ed..c640acb 100644
--- a/ui/views/test/test_tooltip_client.h
+++ b/ui/views/test/test_tooltip_client.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_AURA_TEST_TEST_TOOLTIP_CLIENT_H_
 #define UI_AURA_TEST_TEST_TOOLTIP_CLIENT_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "ui/aura/client/tooltip_client.h"
diff --git a/ui/views/test/views_test_base.h b/ui/views/test/views_test_base.h
index be94a0a..267cc31 100644
--- a/ui/views/test/views_test_base.h
+++ b/ui/views/test/views_test_base.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_TEST_VIEWS_TEST_BASE_H_
 #define UI_VIEWS_TEST_VIEWS_TEST_BASE_H_
-#pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
diff --git a/ui/views/test/webview_test_helper.h b/ui/views/test/webview_test_helper.h
index a6fe1d7..46cf4e6 100644
--- a/ui/views/test/webview_test_helper.h
+++ b/ui/views/test/webview_test_helper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_TEST_WEB_VIEW_TEST_HELPER_H_
 #define UI_VIEWS_TEST_WEB_VIEW_TEST_HELPER_H_
-#pragma once
 
 #include "base/memory/scoped_ptr.h"
 
diff --git a/ui/views/touchui/touch_selection_controller.h b/ui/views/touchui/touch_selection_controller.h
index 5318c9d..a9a6338 100644
--- a/ui/views/touchui/touch_selection_controller.h
+++ b/ui/views/touchui/touch_selection_controller.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_H_
 #define UI_VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_H_
-#pragma once
 
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/gfx/point.h"
diff --git a/ui/views/touchui/touch_selection_controller_impl.h b/ui/views/touchui/touch_selection_controller_impl.h
index 7e8eff4..08a0c0a 100644
--- a/ui/views/touchui/touch_selection_controller_impl.h
+++ b/ui/views/touchui/touch_selection_controller_impl.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_UI_VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_
 #define UI_UI_VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_
-#pragma once
 
 #include "base/timer.h"
 #include "ui/gfx/point.h"
diff --git a/ui/views/view.h b/ui/views/view.h
index 9056f9f..0f6e33f 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_VIEW_H_
 #define UI_VIEWS_VIEW_H_
-#pragma once
 
 #include <algorithm>
 #include <map>
diff --git a/ui/views/view_constants.h b/ui/views/view_constants.h
index 96f07c4..2b0171f 100644
--- a/ui/views/view_constants.h
+++ b/ui/views/view_constants.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_VIEW_CONSTANTS_H_
 #define UI_VIEWS_VIEW_CONSTANTS_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/views/view_model.h b/ui/views/view_model.h
index d94e728..e8c84a9 100644
--- a/ui/views/view_model.h
+++ b/ui/views/view_model.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_VIEW_MODEL_H_
 #define UI_VIEWS_VIEW_MODEL_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/views/view_model_utils.h b/ui/views/view_model_utils.h
index 2993aaa..2d7eb89 100644
--- a/ui/views/view_model_utils.h
+++ b/ui/views/view_model_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_VIEW_MODEL_UTILS_H_
 #define UI_VIEWS_VIEW_MODEL_UTILS_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/view_text_utils.h b/ui/views/view_text_utils.h
index c0141a5..0d7f1b0 100644
--- a/ui/views/view_text_utils.h
+++ b/ui/views/view_text_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_VIEW_TEXT_UTILS_H_
 #define UI_VIEWS_VIEW_TEXT_UTILS_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/views/views_export.h"
diff --git a/ui/views/views_delegate.h b/ui/views/views_delegate.h
index 11e38f5..f4d03e3 100644
--- a/ui/views/views_delegate.h
+++ b/ui/views/views_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_VIEWS_DELEGATE_H_
 #define UI_VIEWS_VIEWS_DELEGATE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/views_export.h b/ui/views/views_export.h
index 6ea906a..05a7ead 100644
--- a/ui/views/views_export.h
+++ b/ui/views/views_export.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_VIEWS_EXPORT_H_
 #define UI_VIEWS_VIEWS_EXPORT_H_
-#pragma once
 
 // Defines VIEWS_EXPORT so that functionality implemented by the Views module
 // can be exported to consumers.
diff --git a/ui/views/widget/aero_tooltip_manager.h b/ui/views/widget/aero_tooltip_manager.h
index db77fc3..0f9db20 100644
--- a/ui/views/widget/aero_tooltip_manager.h
+++ b/ui/views/widget/aero_tooltip_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_AERO_TOOLTIP_MANAGER_H_
 #define UI_VIEWS_WIDGET_AERO_TOOLTIP_MANAGER_H_
-#pragma once
 
 #include "base/memory/ref_counted.h"
 #include "ui/views/widget/tooltip_manager_win.h"
diff --git a/ui/views/widget/child_window_message_processor.h b/ui/views/widget/child_window_message_processor.h
index 92e4847..112d9d8 100644
--- a/ui/views/widget/child_window_message_processor.h
+++ b/ui/views/widget/child_window_message_processor.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_CHILD_WINDOW_MESSAGE_PROCESSOR_H_
 #define UI_VIEWS_WIDGET_CHILD_WINDOW_MESSAGE_PROCESSOR_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/views/widget/default_theme_provider.h b/ui/views/widget/default_theme_provider.h
index ca135b2..a0f504c 100644
--- a/ui/views/widget/default_theme_provider.h
+++ b/ui/views/widget/default_theme_provider.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_DEFAULT_THEME_PROVIDER_H_
 #define UI_VIEWS_WIDGET_DEFAULT_THEME_PROVIDER_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/views/widget/desktop_native_widget_helper_aura.h b/ui/views/widget/desktop_native_widget_helper_aura.h
index 91ac740..e8ef105 100644
--- a/ui/views/widget/desktop_native_widget_helper_aura.h
+++ b/ui/views/widget/desktop_native_widget_helper_aura.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_DESKTOP_NATIVE_WIDGET_HELPER_AURA_H_
 #define UI_VIEWS_WIDGET_DESKTOP_NATIVE_WIDGET_HELPER_AURA_H_
-#pragma once
 
 #include "ui/aura/root_window_observer.h"
 #include "ui/gfx/rect.h"
diff --git a/ui/views/widget/drop_helper.h b/ui/views/widget/drop_helper.h
index 38627d3..9247e1e 100644
--- a/ui/views/widget/drop_helper.h
+++ b/ui/views/widget/drop_helper.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_DROP_HELPER_H_
 #define UI_VIEWS_WIDGET_DROP_HELPER_H_
-#pragma once
 
 #include "base/basictypes.h"
 
diff --git a/ui/views/widget/drop_target_win.h b/ui/views/widget/drop_target_win.h
index 3249ec5..40e89c6 100644
--- a/ui/views/widget/drop_target_win.h
+++ b/ui/views/widget/drop_target_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_DROP_TARGET_WIN_H_
 #define UI_VIEWS_WIDGET_DROP_TARGET_WIN_H_
-#pragma once
 
 #include "ui/base/dragdrop/drop_target.h"
 #include "ui/views/widget/drop_helper.h"
diff --git a/ui/views/widget/monitor_win.h b/ui/views/widget/monitor_win.h
index 4fcbd6f..5cc7471 100644
--- a/ui/views/widget/monitor_win.h
+++ b/ui/views/widget/monitor_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_MONITOR_WIN_H_
 #define UI_VIEWS_WIDGET_MONITOR_WIN_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/views/widget/native_widget.h b/ui/views/widget/native_widget.h
index 1e1a2a8..d01265f 100644
--- a/ui/views/widget/native_widget.h
+++ b/ui/views/widget/native_widget.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_H_
-#pragma once
 
 #include "ui/views/widget/widget.h"
 
diff --git a/ui/views/widget/native_widget_aura.h b/ui/views/widget/native_widget_aura.h
index f4c177f..240e657 100644
--- a/ui/views/widget/native_widget_aura.h
+++ b/ui/views/widget/native_widget_aura.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
-#pragma once
 
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
diff --git a/ui/views/widget/native_widget_delegate.h b/ui/views/widget/native_widget_delegate.h
index 84e6e73..ca8abc3 100644
--- a/ui/views/widget/native_widget_delegate.h
+++ b/ui/views/widget/native_widget_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_
-#pragma once
 
 #include <vector>
 
diff --git a/ui/views/widget/native_widget_helper_aura.h b/ui/views/widget/native_widget_helper_aura.h
index 49111d0..4c21b34 100644
--- a/ui/views/widget/native_widget_helper_aura.h
+++ b/ui/views/widget/native_widget_helper_aura.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_HELPER_AURA_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_HELPER_AURA_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 #include "ui/views/widget/widget.h"
diff --git a/ui/views/widget/native_widget_private.h b/ui/views/widget/native_widget_private.h
index c4caa17..6f25459 100644
--- a/ui/views/widget/native_widget_private.h
+++ b/ui/views/widget/native_widget_private.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_
-#pragma once
 
 #include "base/string16.h"
 #include "ui/base/ui_base_types.h"
diff --git a/ui/views/widget/native_widget_test_utils.h b/ui/views/widget/native_widget_test_utils.h
index 91a2d77..4beacdd 100644
--- a/ui/views/widget/native_widget_test_utils.h
+++ b/ui/views/widget/native_widget_test_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_TEST_UTILS_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_TEST_UTILS_H_
-#pragma once
 
 namespace views {
 namespace internal {
diff --git a/ui/views/widget/native_widget_win.h b/ui/views/widget/native_widget_win.h
index 0c5585c..08ca047 100644
--- a/ui/views/widget/native_widget_win.h
+++ b/ui/views/widget/native_widget_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_WIN_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_WIN_H_
-#pragma once
 
 #include <atlbase.h>
 #include <atlapp.h>
diff --git a/ui/views/widget/root_view.h b/ui/views/widget/root_view.h
index 2db8a91..b749d1a 100644
--- a/ui/views/widget/root_view.h
+++ b/ui/views/widget/root_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_ROOT_VIEW_H_
 #define UI_VIEWS_WIDGET_ROOT_VIEW_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/widget/tooltip_manager.h b/ui/views/widget/tooltip_manager.h
index 63684b6..dd14877 100644
--- a/ui/views/widget/tooltip_manager.h
+++ b/ui/views/widget/tooltip_manager.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_TOOLTIP_MANAGER_H_
 #define UI_VIEWS_WIDGET_TOOLTIP_MANAGER_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/widget/tooltip_manager_aura.h b/ui/views/widget/tooltip_manager_aura.h
index 0ee7d6e..9e10917 100644
--- a/ui/views/widget/tooltip_manager_aura.h
+++ b/ui/views/widget/tooltip_manager_aura.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_TOOLTIP_MANAGER_AURA_H_
 #define UI_VIEWS_WIDGET_TOOLTIP_MANAGER_AURA_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/string16.h"
diff --git a/ui/views/widget/tooltip_manager_win.h b/ui/views/widget/tooltip_manager_win.h
index 8965251..566d777 100644
--- a/ui/views/widget/tooltip_manager_win.h
+++ b/ui/views/widget/tooltip_manager_win.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_TOOLTIP_MANAGER_WIN_H_
 #define UI_VIEWS_WIDGET_TOOLTIP_MANAGER_WIN_H_
-#pragma once
 
 #include <windows.h>
 #include <commctrl.h>
diff --git a/ui/views/widget/widget.h b/ui/views/widget/widget.h
index 6e1111c..f16ea6b 100644
--- a/ui/views/widget/widget.h
+++ b/ui/views/widget/widget.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
-#pragma once
 
 #include <set>
 #include <stack>
diff --git a/ui/views/widget/widget_delegate.h b/ui/views/widget/widget_delegate.h
index 8c97937..33f3ccd 100644
--- a/ui/views/widget/widget_delegate.h
+++ b/ui/views/widget/widget_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_WIDGET_DELEGATE_H_
 #define UI_VIEWS_WIDGET_WIDGET_DELEGATE_H_
-#pragma once
 
 #include <string>
 
diff --git a/ui/views/widget/widget_hwnd_utils.h b/ui/views/widget/widget_hwnd_utils.h
index cf7010d..c6947cc 100644
--- a/ui/views/widget/widget_hwnd_utils.h
+++ b/ui/views/widget/widget_hwnd_utils.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_WIDGET_HWND_UTILS_H_
 #define UI_VIEWS_WIDGET_WIDGET_HWND_UTILS_H_
-#pragma once
 
 #include <windows.h>
 
diff --git a/ui/views/widget/widget_message_filter.h b/ui/views/widget/widget_message_filter.h
index a453d58..1ea083b 100644
--- a/ui/views/widget/widget_message_filter.h
+++ b/ui/views/widget/widget_message_filter.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_WIDGET_MESSAGE_FILTER_H_
 #define UI_VIEWS_WIDGET_WIDGET_MESSAGE_FILTER_H_
-#pragma once
 
 #include "ui/base/win/hwnd_subclass.h"
 
diff --git a/ui/views/widget/x11_desktop_handler.h b/ui/views/widget/x11_desktop_handler.h
index c3a9ba0..144288e 100644
--- a/ui/views/widget/x11_desktop_handler.h
+++ b/ui/views/widget/x11_desktop_handler.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_X11_DESKTOP_HANDLER_H_
 #define UI_VIEWS_WIDGET_X11_DESKTOP_HANDLER_H_
-#pragma once
 
 #include <X11/Xlib.h>
 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
diff --git a/ui/views/widget/x11_window_event_filter.h b/ui/views/widget/x11_window_event_filter.h
index 9ff00e7..935d7e4 100644
--- a/ui/views/widget/x11_window_event_filter.h
+++ b/ui/views/widget/x11_window_event_filter.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WIDGET_X11_WINDOW_EVENT_FILTER_H_
 #define UI_VIEWS_WIDGET_X11_WINDOW_EVENT_FILTER_H_
-#pragma once
 
 #include <X11/Xlib.h>
 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
diff --git a/ui/views/window/client_view.h b/ui/views/window/client_view.h
index b37254d..ba23419 100644
--- a/ui/views/window/client_view.h
+++ b/ui/views/window/client_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WINDOW_CLIENT_VIEW_H_
 #define UI_VIEWS_WINDOW_CLIENT_VIEW_H_
-#pragma once
 
 #include "ui/views/view.h"
 
diff --git a/ui/views/window/custom_frame_view.h b/ui/views/window/custom_frame_view.h
index 50b6e86..04e74ef 100644
--- a/ui/views/window/custom_frame_view.h
+++ b/ui/views/window/custom_frame_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WINDOW_CUSTOM_FRAME_VIEW_H_
 #define UI_VIEWS_WINDOW_CUSTOM_FRAME_VIEW_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
diff --git a/ui/views/window/dialog_client_view.h b/ui/views/window/dialog_client_view.h
index c32522e..977891e 100644
--- a/ui/views/window/dialog_client_view.h
+++ b/ui/views/window/dialog_client_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WINDOW_DIALOG_CLIENT_VIEW_H_
 #define UI_VIEWS_WINDOW_DIALOG_CLIENT_VIEW_H_
-#pragma once
 
 #include "ui/gfx/font.h"
 #include "ui/views/controls/button/button.h"
diff --git a/ui/views/window/dialog_delegate.h b/ui/views/window/dialog_delegate.h
index 34a8bb5..9dd878a 100644
--- a/ui/views/window/dialog_delegate.h
+++ b/ui/views/window/dialog_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WINDOW_DIALOG_DELEGATE_H_
 #define UI_VIEWS_WINDOW_DIALOG_DELEGATE_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/string16.h"
diff --git a/ui/views/window/frame_background.h b/ui/views/window/frame_background.h
index 4b0d390..b8684f6 100644
--- a/ui/views/window/frame_background.h
+++ b/ui/views/window/frame_background.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WINDOW_FRAME_BACKGROUND_H_
 #define UI_VIEWS_WINDOW_FRAME_BACKGROUND_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkColor.h"
diff --git a/ui/views/window/native_frame_view.h b/ui/views/window/native_frame_view.h
index 78d3d77..304867c 100644
--- a/ui/views/window/native_frame_view.h
+++ b/ui/views/window/native_frame_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WINDOW_NATIVE_FRAME_VIEW_H_
 #define UI_VIEWS_WINDOW_NATIVE_FRAME_VIEW_H_
-#pragma once
 
 #include "ui/views/window/non_client_view.h"
 
diff --git a/ui/views/window/non_client_view.h b/ui/views/window/non_client_view.h
index 6f48c33..53ee72b 100644
--- a/ui/views/window/non_client_view.h
+++ b/ui/views/window/non_client_view.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WINDOW_NON_CLIENT_VIEW_H_
 #define UI_VIEWS_WINDOW_NON_CLIENT_VIEW_H_
-#pragma once
 
 #include "ui/views/view.h"
 #include "ui/views/window/client_view.h"
diff --git a/ui/views/window/window_resources.h b/ui/views/window/window_resources.h
index 0dd0dc0..55a4a09 100644
--- a/ui/views/window/window_resources.h
+++ b/ui/views/window/window_resources.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WINDOW_WINDOW_RESOURCES_H_
 #define UI_VIEWS_WINDOW_WINDOW_RESOURCES_H_
-#pragma once
 
 namespace gfx {
 class ImageSkia;
diff --git a/ui/views/window/window_shape.h b/ui/views/window/window_shape.h
index 2dfc214..dde0f62 100644
--- a/ui/views/window/window_shape.h
+++ b/ui/views/window/window_shape.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_VIEWS_WINDOW_WINDOW_SHAPE_H_
 #define UI_VIEWS_WINDOW_WINDOW_SHAPE_H_
-#pragma once
 
 #include "ui/views/views_export.h"
 
diff --git a/ui/web_dialogs/constrained_web_dialog_ui.h b/ui/web_dialogs/constrained_web_dialog_ui.h
index bf60c33..45da6ef 100644
--- a/ui/web_dialogs/constrained_web_dialog_ui.h
+++ b/ui/web_dialogs/constrained_web_dialog_ui.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_WEB_DIALOGS_CONSTRAINED_WEB_DIALOG_UI_H_
 #define UI_WEB_DIALOGS_CONSTRAINED_WEB_DIALOG_UI_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "content/public/browser/web_ui_controller.h"
diff --git a/ui/web_dialogs/web_dialog_delegate.h b/ui/web_dialogs/web_dialog_delegate.h
index 0a46e04..51fafa2 100644
--- a/ui/web_dialogs/web_dialog_delegate.h
+++ b/ui/web_dialogs/web_dialog_delegate.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_WEB_DIALOGS_WEB_DIALOG_DELEGATE_H_
 #define UI_WEB_DIALOGS_WEB_DIALOG_DELEGATE_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/web_dialogs/web_dialog_observer.h b/ui/web_dialogs/web_dialog_observer.h
index 785dde2..57995ee 100644
--- a/ui/web_dialogs/web_dialog_observer.h
+++ b/ui/web_dialogs/web_dialog_observer.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_WEB_DIALOGS_WEB_DIALOG_OBSERVER_H_
 #define UI_WEB_DIALOGS_WEB_DIALOG_OBSERVER_H_
-#pragma once
 
 namespace content {
 class RenderViewHost;
diff --git a/ui/web_dialogs/web_dialog_ui.h b/ui/web_dialogs/web_dialog_ui.h
index c2c63a5..562cbb4 100644
--- a/ui/web_dialogs/web_dialog_ui.h
+++ b/ui/web_dialogs/web_dialog_ui.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_WEB_DIALOGS_WEB_DIALOG_UI_H_
 #define UI_WEB_DIALOGS_WEB_DIALOG_UI_H_
-#pragma once
 
 #include <string>
 #include <vector>
diff --git a/ui/web_dialogs/web_dialogs_export.h b/ui/web_dialogs/web_dialogs_export.h
index 8f37ed6..36fae43 100644
--- a/ui/web_dialogs/web_dialogs_export.h
+++ b/ui/web_dialogs/web_dialogs_export.h
@@ -4,7 +4,6 @@
 
 #ifndef UI_WEB_DIALOGS_WEB_DIALOGS_EXPORT_H_
 #define UI_WEB_DIALOGS_WEB_DIALOGS_EXPORT_H_
-#pragma once
 
 // Defines WEB_DIALOGS_EXPORT so that functionality implemented by the
 // web_dialogs module can be exported to consumers.
author	ajwong@chromium.org <ajwong@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>	2012-07-11 19:01:43 +0000
committer	ajwong@chromium.org <ajwong@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>	2012-07-11 19:01:43 +0000
commit	01c86ece0232e9b15bff05f1ee508c7f6bdc2ef0 (patch)
tree	ce78aa58908c7bc64bcb3596bd1298b872b85701 /ui
parent	a19317f99fd8f35cd2bf8ebe3d0f34dc71866574 (diff)
download	chromium_src-01c86ece0232e9b15bff05f1ee508c7f6bdc2ef0.zip chromium_src-01c86ece0232e9b15bff05f1ee508c7f6bdc2ef0.tar.gz chromium_src-01c86ece0232e9b15bff05f1ee508c7f6bdc2ef0.tar.bz2