Make <a ping> work for context menus.

content/content_renderer.gypi

 # 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.
 
 {
   'dependencies': [
     'content_common_mojo_bindings',
     '../base/base.gyp:base',
     '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
     '../cc/cc.gyp:cc',
@@ skipping 170 matching lines @@
       'renderer/dom_automation_controller.h',
       'renderer/dom_storage/dom_storage_cached_area.cc',
       'renderer/dom_storage/dom_storage_cached_area.h',
       'renderer/dom_storage/dom_storage_dispatcher.cc',
       'renderer/dom_storage/dom_storage_dispatcher.h',
       'renderer/dom_storage/dom_storage_proxy.h',
       'renderer/dom_storage/webstoragearea_impl.cc',
       'renderer/dom_storage/webstoragearea_impl.h',
       'renderer/dom_storage/webstoragenamespace_impl.cc',
       'renderer/dom_storage/webstoragenamespace_impl.h',
+      'renderer/dom_utils.cc',
+      'renderer/dom_utils.h',
       'renderer/drop_data_builder.cc',
       'renderer/drop_data_builder.h',
       'renderer/fetchers/image_resource_fetcher.cc',
       'renderer/fetchers/image_resource_fetcher.h',
       'renderer/fetchers/multi_resolution_image_resource_fetcher.cc',
       'renderer/fetchers/multi_resolution_image_resource_fetcher.h',
       'renderer/fetchers/resource_fetcher_impl.cc',
       'renderer/fetchers/resource_fetcher_impl.h',
       'renderer/gamepad_shared_memory_reader.cc',
       'renderer/gamepad_shared_memory_reader.h',
@@ skipping 677 matching lines @@
     }],
   ],
   'target_conditions': [
     ['OS=="android"', {
       'sources/': [
         ['include', '^renderer/render_view_linux\\.cc$'],
       ],
     }],
   ],
 }