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

chrome/test/data/webui/settings/cr_settings_browsertest.js

Index: chrome/test/data/webui/settings/cr_settings_browsertest.js
diff --git a/chrome/test/data/webui/settings/cr_settings_browsertest.js b/chrome/test/data/webui/settings/cr_settings_browsertest.js
index 092b6b99ec8fc5c03d30e25fcb84bd8aa79e0aa8..bd9d622a14a96ccb674b3ada1cc70cf2085d514b 100644
--- a/chrome/test/data/webui/settings/cr_settings_browsertest.js
+++ b/chrome/test/data/webui/settings/cr_settings_browsertest.js
@@ -1090,12 +1090,13 @@ CrSettingsLanguagesTest.prototype = {
     'test_browser_proxy.js',
     'fake_language_settings_private.js',
     'fake_settings_private.js',
+    'fake_input_method_private.js',
     'languages_tests.js',
   ]),
 };
 
 // Flaky on Win and Linux, see http://crbug/692356.
-TEST_F('CrSettingsLanguagesTest', 'DISABLED_Languages', function() {
+TEST_F('CrSettingsLanguagesTest', 'Languages', function() {
   mocha.run();
 });