MD Settings: create a shared handler/browser proxy to control extensions

chrome/browser/resources/settings/search_engines_page/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': 'search_engine_dialog',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:load_time_data',
@@ skipping 12 matching lines @@
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'omnibox_extension_entry',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/cr_elements/cr_action_menu/compiled_resources2.gyp:cr_action_menu',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:assert',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:icon',
+        '../compiled_resources2.gyp:extension_control_browser_proxy',
         'search_engines_browser_proxy',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'search_engines_browser_proxy',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:web_ui_listener_behavior',
       ],
@@ skipping 13 matching lines @@
       'dependencies': [
         '<(DEPTH)/third_party/polymer/v1_0/components-chromium/iron-resizable-behavior/compiled_resources2.gyp:iron-resizable-behavior-extracted',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:load_time_data',
         'search_engines_browser_proxy',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }