chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/location_bar/zoom_bubble_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_ZOOM_BUBBLE_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/ui/views/frame/immersive_mode_controller.h"
 #include "chrome/browser/ui/views/location_bar/location_bar_bubble_delegate_view.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/extension_icon_image.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/label.h"
 
-class FullscreenController;
-
 namespace content {
-class NotificationDetails;
-class NotificationSource;
 class WebContents;
 }
 
 namespace views {
 class ImageButton;
 }  // namespace views
 
 // View used to display the zoom percentage when it has changed.
 class ZoomBubbleView : public LocationBarBubbleDelegateView,
                        public views::ButtonListener,
@@ skipping 99 matching lines @@
 
   // The immersive mode controller for the BrowserView containing
   // |web_contents_|.
   // Not owned.
   ImmersiveModeController* immersive_mode_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(ZoomBubbleView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_