MD WebUI: Pull 'X selected' toolbar overlay from History into shared element

ui/webui/resources/cr_elements/cr_toolbar/compiled_resources2.gyp

 # Copyright 2016 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': 'cr_toolbar_search_field',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/cr_elements/cr_search_field/compiled_resources2.gyp:cr_search_field_behavior',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
+      'target_name': 'cr_toolbar_selection_overlay',
+      'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
+    },
+    {
       'target_name': 'cr_toolbar',
       'dependencies': [
         '<(EXTERNS_GYP):web_animations',
         'cr_toolbar_search_field',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }