bookmarks: Move BookmarkModelObserver into 'bookmarks' namespace.

chrome/browser/ui/cocoa/bookmarks/bookmark_model_observer_for_cocoa.h

 // Copyright (c) 2012 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.
 
 // C++ bridge class to send a selector to a Cocoa object when the
 // bookmark model changes.  Some Cocoa objects edit the bookmark model
 // and temporarily save a copy of the state (e.g. bookmark button
 // editor).  As a fail-safe, these objects want an easy cancel if the
 // model changes out from under them.  For example, if you have the
 // bookmark button editor sheet open, then edit the bookmark in the
@@ skipping 10 matching lines @@
 
 #import <Cocoa/Cocoa.h>
 
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/mac/scoped_block.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/bookmarks/browser/bookmark_model_observer.h"
 
-class BookmarkModelObserverForCocoa : public BookmarkModelObserver {
+class BookmarkModelObserverForCocoa : public bookmarks::BookmarkModelObserver {
  public:
   // Callback called on a significant model change. |nodeWasDeleted| will
   // be YES if an observed node was deleted in the change.
   typedef void(^ChangeCallback)(BOOL nodeWasDeleted);
 
   // When a |model| changes, or an observed node within it does, call a
   // |callback|.
   BookmarkModelObserverForCocoa(BookmarkModel* model,
                                 ChangeCallback callback);
   ~BookmarkModelObserverForCocoa() override;
 
   // Starts and stops observing a specified |node|; the node must be contained
   // within the model.
   void StartObservingNode(const BookmarkNode* node);
   void StopObservingNode(const BookmarkNode* node);
 
-  // BookmarkModelObserver:
+  // bookmarks::BookmarkModelObserver:
   void BookmarkModelBeingDeleted(BookmarkModel* model) override;
   void BookmarkNodeMoved(BookmarkModel* model,
                          const BookmarkNode* old_parent,
                          int old_index,
                          const BookmarkNode* new_parent,
                          int new_index) override;
   void BookmarkNodeRemoved(BookmarkModel* model,
                            const BookmarkNode* parent,
                            int old_index,
                            const BookmarkNode* node,
@@ skipping 26 matching lines @@
   base::mac::ScopedBlock<ChangeCallback> callback_;
 
   // Send a notification to the client; |deleted| is YES if an observed node was
   // deleted in the change.
   void Notify(BOOL deleted);
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkModelObserverForCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_FOR_COCOA_H