bookmarks: Move BaseBookmarkModelObserver into 'bookmarks' namespace.

components/bookmarks/browser/base_bookmark_model_observer.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_BASE_BOOKMARK_MODEL_OBSERVER_H_
 #define COMPONENTS_BOOKMARKS_BROWSER_BASE_BOOKMARK_MODEL_OBSERVER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "components/bookmarks/browser/bookmark_model_observer.h"
 
+namespace bookmarks {
+
 // Base class for a BookmarkModelObserver implementation. All mutations of the
 // model funnel into the method BookmarkModelChanged.
 class BaseBookmarkModelObserver : public BookmarkModelObserver {
  public:
   BaseBookmarkModelObserver() {}
 
   virtual void BookmarkModelChanged() = 0;
 
   // BookmarkModelObserver:
   void BookmarkModelLoaded(BookmarkModel* model, bool ids_reassigned) override;
@@ skipping 20 matching lines @@
   void BookmarkNodeChildrenReordered(BookmarkModel* model,
                                      const BookmarkNode* node) override;
 
  protected:
   ~BaseBookmarkModelObserver() override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BaseBookmarkModelObserver);
 };
 
+}  // namespace bookmarks
+
 #endif  // COMPONENTS_BOOKMARKS_BROWSER_BASE_BOOKMARK_MODEL_OBSERVER_H_