Move bookmark_model_observer.h to the bookmarks component

chrome/browser/android/provider/bookmark_model_observer_task.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_ANDROID_PROVIDER_BOOKMARK_MODEL_OBSERVER_TASK_H_
 #define CHROME_BROWSER_ANDROID_PROVIDER_BOOKMARK_MODEL_OBSERVER_TASK_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "chrome/browser/bookmarks/bookmark_model_observer.h"
+#include "components/bookmarks/core/browser/bookmark_model_observer.h"
 
 // Base class for synchronous tasks that involve the bookmark model.
 // Ensures the model has been loaded before accessing it.
 // Must not be created from the UI thread.
 class BookmarkModelTask {
  public:
   explicit BookmarkModelTask(BookmarkModel* model);
   BookmarkModel* model() const;
 
  private:
@@ skipping 30 matching lines @@
   virtual void BookmarkNodeFaviconChanged(BookmarkModel* model,
                                           const BookmarkNode* node) OVERRIDE;
   virtual void BookmarkNodeChildrenReordered(BookmarkModel* model,
                                              const BookmarkNode* node) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BookmarkModelObserverTask);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_PROVIDER_BOOKMARK_MODEL_OBSERVER_TASK_H_