chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/content_setting_bubble_contents.h

 // Copyright (c) 2011 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_CONTENT_SETTING_BUBBLE_CONTENTS_H_
 #define CHROME_BROWSER_UI_VIEWS_CONTENT_SETTING_BUBBLE_CONTENTS_H_
 
 #include <list>
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/media_stream_request.h"
 #include "ui/base/models/combobox_model.h"
 #include "ui/views/bubble/bubble_dialog_delegate.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/combobox/combobox_listener.h"
 #include "ui/views/controls/link_listener.h"
 
 class ContentSettingBubbleModel;
-class Profile;
 
 namespace chrome {
 class ContentSettingBubbleViewsBridge;
 }
 
 namespace views {
 class RadioButton;
 class LabelButton;
 }
 
@@ skipping 86 matching lines @@
   views::LabelButton* manage_button_;
   views::Link* learn_more_link_;
 
   // Combobox models the bubble owns.
   std::list<MediaComboboxModel> combobox_models_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ContentSettingBubbleContents);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_CONTENT_SETTING_BUBBLE_CONTENTS_H_