MD Settings: Use a browser proxy from the languages page. Re-enable test.

chrome/browser/resources/settings/languages_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': 'languages_browser_proxy',
+      'dependencies': [
+        '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
+        '<(EXTERNS_GYP):chrome_send',
+        '<(EXTERNS_GYP):input_method_private',
+        '<(EXTERNS_GYP):language_settings_private',
+        '<(INTERFACES_GYP):input_method_private_interface',
+        '<(INTERFACES_GYP):language_settings_private_interface',
+      ],
+      'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
+    },
+    {
       'target_name': 'languages',
       'dependencies': [
         '<(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:promise_resolver',
-        '<(EXTERNS_GYP):chrome_send',
         '<(EXTERNS_GYP):input_method_private',
         '<(EXTERNS_GYP):language_settings_private',
         '<(INTERFACES_GYP):input_method_private_interface',
         '<(INTERFACES_GYP):language_settings_private_interface',
         '../prefs/compiled_resources2.gyp:prefs_types',
         '../prefs/compiled_resources2.gyp:prefs',
         'languages_types',
+        'languages_browser_proxy',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'languages_page',
       'dependencies': [
         '../compiled_resources2.gyp:lifetime_browser_proxy',
         '../compiled_resources2.gyp:route',
         '../settings_page/compiled_resources2.gyp:settings_animated_pages',
         '<(DEPTH)/third_party/polymer/v1_0/components-chromium/paper-checkbox/compiled_resources2.gyp:paper-checkbox-extracted',
@@ skipping 33 matching lines @@
       'dependencies': [
         '<(DEPTH)/third_party/polymer/v1_0/components-chromium/paper-checkbox/compiled_resources2.gyp:paper-checkbox-extracted',
         '<(DEPTH)/ui/webui/resources/cr_elements/compiled_resources2.gyp:cr_scrollable_behavior',
         'languages',
         'languages_types',
       ],
       'includes': ['../../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }