bookmarks: Move BookmarkModelObserver into 'bookmarks' namespace.

chrome/browser/extensions/api/bookmarks/bookmarks_api.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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_BOOKMARKS_BOOKMARKS_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_BOOKMARKS_BOOKMARKS_API_H_
 
 #include <list>
 #include <string>
 #include <vector>
@@ skipping 21 matching lines @@
 namespace extensions {
 
 namespace api {
 namespace bookmarks {
 struct CreateDetails;
 }
 }
 
 // Observes BookmarkModel and then routes the notifications as events to
 // the extension system.
-class BookmarkEventRouter : public BookmarkModelObserver {
+class BookmarkEventRouter : public bookmarks::BookmarkModelObserver {
  public:
   explicit BookmarkEventRouter(Profile* profile);
   ~BookmarkEventRouter() override;
 
   // BookmarkModelObserver:
   void BookmarkModelLoaded(BookmarkModel* model, bool ids_reassigned) override;
   void BookmarkModelBeingDeleted(BookmarkModel* model) override;
   void BookmarkNodeMoved(BookmarkModel* model,
                          const BookmarkNode* old_parent,
                          int old_index,
@@ skipping 299 matching lines @@
  private:
   ~BookmarksExportFunction() override {}
 
   // BookmarksFunction:
   bool RunOnReady() override;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_BOOKMARKS_BOOKMARKS_API_H_