Set version field when changes are made to enhanced bookmarks.

components/enhanced_bookmarks.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'enhanced_bookmarks',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         '../base/base.gyp:base',
         '../net/net.gyp:net',
         '../sql/sql.gyp:sql',
         '../ui/gfx/gfx.gyp:gfx',
         '../url/url.gyp:url_lib',
         'bookmarks_browser',
         'enhanced_bookmarks_proto',
         'keyed_service_core',
       ],
       'sources': [
         'enhanced_bookmarks/bookmark_image_service.cc',
         'enhanced_bookmarks/bookmark_image_service.h',
+        'enhanced_bookmarks/enhanced_bookmark_model.cc',
+        'enhanced_bookmarks/enhanced_bookmark_model.h',
         'enhanced_bookmarks/enhanced_bookmark_utils.cc',
         'enhanced_bookmarks/enhanced_bookmark_utils.h',
         'enhanced_bookmarks/image_store.cc',
         'enhanced_bookmarks/image_store.h',
         'enhanced_bookmarks/image_store_util.cc',
         'enhanced_bookmarks/image_store_util.h',
         'enhanced_bookmarks/image_store_util_ios.mm',
         'enhanced_bookmarks/item_position.cc',
         'enhanced_bookmarks/item_position.h',
         'enhanced_bookmarks/metadata_accessor.cc',
@@ skipping 70 matching lines @@
           ],
           'variables': {
             'jni_gen_package': 'enhanced_bookmarks',
           },
           'includes': [ '../build/jni_generator.gypi' ],
         },
       ],
     }]
   ],
 }