FBTB: Remove unneeded #includes of base/ref_counted.h and base/string16.h in src/chrome.

chrome/browser/bookmarks/bookmark_editor.h

 // Copyright (c) 2010 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_BOOKMARKS_BOOKMARK_EDITOR_H_
 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_EDITOR_H_
 #pragma once
 
-#include <string>
 #include <utility>
 #include <vector>
 
 #include "base/string16.h"
 #include "gfx/native_widget_types.h"
 
 class BookmarkNode;
 class GURL;
 class Profile;
 
@@ skipping 49 matching lines @@
   // |parent| gives the initial parent to select in the tree for the node.
   // |parent| is only used if |details.existing_node| is null.
   static void Show(gfx::NativeWindow parent_window,
                    Profile* profile,
                    const BookmarkNode* parent,
                    const EditDetails& details,
                    Configuration configuration);
 };
 
 #endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_EDITOR_H_