4 files changed, 4 insertions, 0 deletions
diff --git a/views/controls/native/native_view_host.h b/views/controls/native/native_view_host.h
index 149e9ae..4d4ba75 100644
--- a/views/controls/native/native_view_host.h
+++ b/views/controls/native/native_view_host.h
@@ -4,6 +4,7 @@
 
 #ifndef VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_H_
 #define VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_H_
+#pragma once
 
 #include <string>
 
diff --git a/views/controls/native/native_view_host_gtk.h b/views/controls/native/native_view_host_gtk.h
index 4c7bb25..fe82160 100644
--- a/views/controls/native/native_view_host_gtk.h
+++ b/views/controls/native/native_view_host_gtk.h
@@ -4,6 +4,7 @@
 
 #ifndef VIEWS_CONTROLS_NATIVE_HOST_VIEW_GTK_H_
 #define VIEWS_CONTROLS_NATIVE_HOST_VIEW_GTK_H_
+#pragma once
 
 #include <gtk/gtk.h>
 #include <string>
diff --git a/views/controls/native/native_view_host_win.h b/views/controls/native/native_view_host_win.h
index 489c9d8..6546f1a 100644
--- a/views/controls/native/native_view_host_win.h
+++ b/views/controls/native/native_view_host_win.h
@@ -4,6 +4,7 @@
 
 #ifndef VIEWS_CONTROLS_HWND_VIEW_H_
 #define VIEWS_CONTROLS_HWND_VIEW_H_
+#pragma once
 
 #include "base/logging.h"
 #include "views/controls/native/native_view_host_wrapper.h"
diff --git a/views/controls/native/native_view_host_wrapper.h b/views/controls/native/native_view_host_wrapper.h
index 056584e..43e9869 100644
--- a/views/controls/native/native_view_host_wrapper.h
+++ b/views/controls/native/native_view_host_wrapper.h
@@ -4,6 +4,7 @@
 
 #ifndef VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
 #define VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
+#pragma once
 
 namespace views {