Cleaned up includes and unused declarations in the bookmarks component.

components/bookmarks/core/browser/bookmark_client.h

 // Copyright 2014 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 COMPONENTS_BOOKMARKS_CORE_BROWSER_BOOKMARK_CLIENT_H_
 #define COMPONENTS_BOOKMARKS_CORE_BROWSER_BOOKMARK_CLIENT_H_
 
 #include <set>
+#include <utility>
 #include <vector>
 
-#include "base/callback.h"
+#include "base/callback_forward.h"
 #include "base/task/cancelable_task_tracker.h"
 
+class BookmarkNode;
 class GURL;
-class BookmarkNode;
 
 namespace base {
 struct UserMetricsAction;
 }
 
 namespace favicon_base {
 struct FaviconImageResult;
 }
 
 // This class abstracts operations that depends on the embedder's environment,
@@ skipping 37 matching lines @@
 
   // Wrapper around RecordAction defined in base/metrics/user_metrics.h
   // that ensure that the action is posted from the correct thread.
   virtual void RecordAction(const base::UserMetricsAction& action) = 0;
 
  protected:
   virtual ~BookmarkClient() {}
 };
 
 #endif  // COMPONENTS_BOOKMARKS_CORE_BROWSER_BOOKMARK_CLIENT_H_