Revert 128328 - Remove stops_event_propagation from Window, since it's broken.

Changes it to be implemented by the Aura client, via a new interface EventClient.
The client can determine whether or not a given window and its subtree can receive events.
I also cleaned up the way screen locking is entered/exited via the delegate, and some stuff in ash/shell.

http://crbug.com/119347
TEST=none
Review URL: https://chromiumcodereview.appspot.com/9788001

TBR=ben@chromium.org
Review URL: https://chromiumcodereview.appspot.com/9808044

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@128338 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 39 insertions, 3 deletions

diff --git a/ash/shell_unittest.cc b/ash/shell_unittest.cc
index d4dd7ea..9f5ff3a 100644
--- a/ash/shell_unittest.cc
+++ b/ash/shell_unittest.cc
@@ -5,7 +5,6 @@
 #include "ash/ash_switches.h"
 #include "ash/launcher/launcher.h"
 #include "ash/shell.h"
-#include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/root_window_layout_manager.h"
@@ -245,9 +244,46 @@ TEST_F(ShellTest, CreateLockScreenModalWindow) {
 }
 
 TEST_F(ShellTest, IsScreenLocked) {
-  ash::Shell::GetInstance()->delegate()->LockScreen();
+  views::Widget::InitParams widget_params(
+      views::Widget::InitParams::TYPE_WINDOW);
+
+  // A normal window does not lock the screen.
+  views::Widget* widget = CreateTestWindow(widget_params);
+  widget->Show();
+  EXPECT_FALSE(Shell::GetInstance()->IsScreenLocked());
+  widget->Hide();
+  EXPECT_FALSE(Shell::GetInstance()->IsScreenLocked());
+
+  // A modal window with a normal window as parent does not locks the screen.
+  views::Widget* modal_widget = views::Widget::CreateWindowWithParent(
+      new ModalWindow(), widget->GetNativeView());
+  modal_widget->Show();
+  EXPECT_FALSE(Shell::GetInstance()->IsScreenLocked());
+  modal_widget->Close();
+  EXPECT_FALSE(Shell::GetInstance()->IsScreenLocked());
+  widget->Close();
+
+  // A lock screen window locks the screen.
+  views::Widget* lock_widget = CreateTestWindow(widget_params);
+  ash::Shell::GetInstance()->GetContainer(
+      ash::internal::kShellWindowId_LockScreenContainer)->
+      AddChild(lock_widget->GetNativeView());
+  lock_widget->Show();
+  EXPECT_TRUE(Shell::GetInstance()->IsScreenLocked());
+  lock_widget->Hide();
+  EXPECT_FALSE(Shell::GetInstance()->IsScreenLocked());
+
+  // A modal window with a lock window as parent does not lock the screen. The
+  // screen is locked only when a lock window is visible.
+  views::Widget* lock_modal_widget = views::Widget::CreateWindowWithParent(
+      new ModalWindow(), lock_widget->GetNativeView());
+  lock_modal_widget->Show();
+  EXPECT_FALSE(Shell::GetInstance()->IsScreenLocked());
+  lock_widget->Show();
+  EXPECT_TRUE(Shell::GetInstance()->IsScreenLocked());
+  lock_modal_widget->Close();
   EXPECT_TRUE(Shell::GetInstance()->IsScreenLocked());
-  ash::Shell::GetInstance()->delegate()->UnlockScreen();
+  lock_widget->Close();
   EXPECT_FALSE(Shell::GetInstance()->IsScreenLocked());
 }