Cleanup: Remove unneeded forward declarations from chrome/browser/ui/views.

chrome/browser/ui/views/bookmarks/bookmark_bar_view.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_BOOKMARKS_BOOKMARK_BAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BAR_VIEW_H_
 #pragma once
 
 #include <set>
+#include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/bookmarks/bookmark_model_observer.h"
 #include "chrome/browser/bookmarks/bookmark_node_data.h"
 #include "chrome/browser/ui/bookmarks/bookmark_bar.h"
 #include "chrome/browser/ui/views/bookmarks/bookmark_bar_instructions_view.h"
 #include "chrome/browser/ui/views/bookmarks/bookmark_menu_controller_views.h"
 #include "chrome/browser/ui/views/detachable_toolbar_view.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ui/base/animation/animation_delegate.h"
 #include "views/context_menu_controller.h"
 #include "views/controls/button/button.h"
 #include "views/controls/menu/view_menu_delegate.h"
 #include "views/drag_controller.h"
 
 class BookmarkContextMenu;
 class Browser;
 class PageNavigator;
-class PrefService;
 
 namespace ui {
 class SlideAnimation;
 }
 
 namespace views {
 class CustomButton;
 class MenuButton;
 class MenuItemView;
 class TextButton;
@@ skipping 363 matching lines @@
 
   BookmarkBar::State bookmark_bar_state_;
 
   // Are we animating to or from the detached state?
   bool animating_detached_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkBarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_BOOKMARKS_BOOKMARK_BAR_VIEW_H_