bookmarks: Move BookmarkNode into 'bookmarks' namespace.

components/bookmarks/browser/bookmark_expanded_state_tracker.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_BROWSER_BOOKMARK_EXPANDED_STATE_TRACKER_H_
 #define COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_EXPANDED_STATE_TRACKER_H_
 
 #include <set>
 
 #include "components/bookmarks/browser/base_bookmark_model_observer.h"
 
-class BookmarkNode;
 class PrefService;
 
 namespace bookmarks {
 
 class BookmarkModel;
+class BookmarkNode;
 
 // BookmarkExpandedStateTracker is used to track a set of expanded nodes. The
 // nodes are persisted in preferences. If an expanded node is removed from the
 // model BookmarkExpandedStateTracker removes the node.
 class BookmarkExpandedStateTracker : public BaseBookmarkModelObserver {
  public:
   typedef std::set<const BookmarkNode*> Nodes;
 
   BookmarkExpandedStateTracker(BookmarkModel* bookmark_model,
                                PrefService* pref_service);
@@ skipping 22 matching lines @@
 
   BookmarkModel* bookmark_model_;
   PrefService* pref_service_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkExpandedStateTracker);
 };
 
 }  // namespace bookmarks
 
 #endif  // COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_EXPANDED_STATE_TRACKER_H_