MD History: Use iron-a11y-announcer to announce search result messages

chrome/browser/resources/md_history/compiled_resources2.gyp

 # Copyright 2015 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': 'constants',
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
@@ skipping 78 matching lines @@
         'constants',
         'app',
         '<(EXTERNS_GYP):chrome_send',
         '../history/compiled_resources2.gyp:externs',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'list_container',
       'dependencies': [
+        '<(DEPTH)/third_party/polymer/v1_0/components-chromium/iron-a11y-announcer/compiled_resources2.gyp:iron-a11y-announcer-extracted',
         '<(DEPTH)/ui/webui/resources/cr_elements/cr_lazy_render/compiled_resources2.gyp:cr_lazy_render',
         'externs',
         'grouped_list',
         'history_list',
         'history_list_behavior',
         '<(EXTERNS_GYP):chrome_send',
         '../history/compiled_resources2.gyp:externs',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
@@ skipping 48 matching lines @@
         '<(DEPTH)/ui/webui/resources/cr_elements/cr_lazy_render/compiled_resources2.gyp:cr_lazy_render',
         '<(DEPTH)/ui/webui/resources/cr_elements/cr_shared_menu/compiled_resources2.gyp:cr_shared_menu',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:focus_grid',
         'browser_service',
         'synced_device_card',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }