views: Extract Widget observer into its own header file.

chrome/browser/ui/views/browser_actions_container.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_BROWSER_ACTIONS_CONTAINER_H_
 #define CHROME_BROWSER_UI_VIEWS_BROWSER_ACTIONS_CONTAINER_H_
 
 #include "chrome/browser/extensions/extension_toolbar_model.h"
 #include "chrome/browser/ui/views/extensions/browser_action_overflow_menu_controller.h"
 #include "chrome/browser/ui/views/extensions/extension_keybinding_registry_views.h"
 #include "content/public/browser/notification_observer.h"
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/base/animation/tween.h"
 #include "ui/views/controls/button/menu_button.h"
 #include "ui/views/controls/button/menu_button_listener.h"
 #include "ui/views/controls/resize_area_delegate.h"
 #include "ui/views/drag_controller.h"
 #include "ui/views/view.h"
-#include "ui/views/widget/widget.h"
+#include "ui/views/widget/widget_observer.h"
 
 class BrowserActionButton;
 class ExtensionPopup;
 
 namespace ui {
 class SlideAnimation;
 }
 
 namespace views {
 class ResizeArea;
@@ skipping 72 matching lines @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 class BrowserActionsContainer
     : public views::View,
       public views::MenuButtonListener,
       public views::DragController,
       public views::ResizeAreaDelegate,
       public ui::AnimationDelegate,
       public ExtensionToolbarModel::Observer,
       public BrowserActionOverflowMenuController::Observer,
-      public views::Widget::Observer {
+      public views::WidgetObserver {
  public:
   BrowserActionsContainer(Browser* browser, views::View* owner_view);
   virtual ~BrowserActionsContainer();
 
   void Init();
 
   // Get the number of browser actions being displayed.
   int num_browser_actions() const { return browser_action_views_.size(); }
 
   // Whether we are performing resize animation on the container.
@@ skipping 69 matching lines @@
   virtual void OnResize(int resize_amount, bool done_resizing) OVERRIDE;
 
   // Overridden from ui::AnimationDelegate:
   virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
   virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
 
   // Overridden from BrowserActionOverflowMenuController::Observer:
   virtual void NotifyMenuDeleted(
       BrowserActionOverflowMenuController* controller) OVERRIDE;
 
-  // Overridden from views::Widget::Observer
+  // Overridden from views::WidgetObserver:
   virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
 
   // Moves a browser action with |id| to |new_index|.
   void MoveBrowserAction(const std::string& extension_id, size_t new_index);
 
   // Hide the current popup.
   void HidePopup();
 
   // Simulate a click on a browser action button.  This should only be
   // used by unit tests.
@@ skipping 150 matching lines @@
 
   base::WeakPtrFactory<BrowserActionsContainer> task_factory_;
 
   // Handles delayed showing of the overflow menu when hovering.
   base::WeakPtrFactory<BrowserActionsContainer> show_menu_task_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserActionsContainer);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_BROWSER_ACTIONS_CONTAINER_H_