cros: Bind hangup red button on remote controller to close web dialog

chrome/browser/ui/browser_dialogs.h

Index: chrome/browser/ui/browser_dialogs.h
diff --git a/chrome/browser/ui/browser_dialogs.h b/chrome/browser/ui/browser_dialogs.h
index 9ece1b6d7476bb1f2223222550e83b4e4f1fa9ca..9b15a11b6272380e586ebd373d5d851fd2349ab8 100644
--- a/chrome/browser/ui/browser_dialogs.h
+++ b/chrome/browser/ui/browser_dialogs.h
@@ -94,11 +94,12 @@ gfx::NativeWindow ShowWebDialog(gfx::NativeView parent,
 #if defined(USE_ASH)
 // Creates and shows an HTML dialog with the given delegate and browser context.
 // The dialog is placed in the ash window hierarchy in the given container.
+// Returns the created window.

[sky, 2017/05/11 15:04:11]

Document the lifetime of the returned window and who owns it.

[Qiang(Joe) Xu, 2017/05/12 21:50:45]

Add the same comment as above: The window is automatically destroyed when it is
closed.

 // See ash/public/cpp/shell_window_ids.h for |container_id| values. The window
 // is destroyed when it is closed. See also chrome::ShowWebDialog().
-void ShowWebDialogInContainer(int container_id,
-                              content::BrowserContext* context,
-                              ui::WebDialogDelegate* delegate);
+gfx::NativeWindow ShowWebDialogInContainer(int container_id,
+                                           content::BrowserContext* context,
+                                           ui::WebDialogDelegate* delegate);
 #endif  // defined(USE_ASH)
 
 // Shows the create chrome app shortcut dialog box.