views: Extract Widget observer into its own header file.

chrome/browser/ui/views/location_bar/content_setting_image_view.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_LOCATION_BAR_CONTENT_SETTING_IMAGE_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_CONTENT_SETTING_IMAGE_VIEW_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string16.h"
 #include "chrome/browser/ui/views/location_bar/touchable_location_bar_view.h"
 #include "chrome/common/content_settings_types.h"
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/views/controls/image_view.h"
-#include "ui/views/widget/widget.h"
+#include "ui/views/widget/widget_observer.h"
 
 class ContentSettingImageModel;
 class ContentSettingBubbleContents;
 class LocationBarView;
 
 namespace content {
 class WebContents;
 }
 
 namespace views {
 class MouseEvent;
 }
 
 namespace ui {
 class SlideAnimation;
 }
 
 class ContentSettingsDelegateView;
 
-class ContentSettingImageView
-    : public views::ImageView,
-      public ui::AnimationDelegate,
-      public views::Widget::Observer,
-      public TouchableLocationBarView {
+class ContentSettingImageView : public views::ImageView,
+                                public ui::AnimationDelegate,
+                                public views::WidgetObserver,
+                                public TouchableLocationBarView {
  public:
   ContentSettingImageView(ContentSettingsType content_type,
                           LocationBarView* parent);
   virtual ~ContentSettingImageView();
 
   // |new_navigation| true if this is a new navigation, false if the tab was
   // just switched to.
   void UpdateFromWebContents(content::WebContents* web_contents);
 
   // views::View overrides:
   virtual gfx::Size GetPreferredSize() OVERRIDE;
 
   // ui::AnimationDelegate overrides:
   virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
   virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
   virtual void AnimationCanceled(const ui::Animation* animation) OVERRIDE;
 
-  // views::Widget::Observer override:
+  // views::WidgetObserver override:
   virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
 
   // TouchableLocationBarView.
   virtual int GetBuiltInHorizontalPadding() const OVERRIDE;
 
  private:
   // views::ImageView overrides:
   virtual bool OnMousePressed(const views::MouseEvent& event) OVERRIDE;
   virtual void OnMouseReleased(const views::MouseEvent& event) OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
@@ skipping 10 matching lines @@
   string16 animated_text_;
   bool pause_animation_;
   int text_size_;
   int visible_text_size_;
   gfx::Insets saved_insets_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ContentSettingImageView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_CONTENT_SETTING_IMAGE_VIEW_H_