Start removing support for the experimental x-webkit-speech API

content/content_tests.gypi

 # Copyright (c) 2013 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': 'layouttest_support_content',
       'type': 'static_library',
       'conditions': [
@@ skipping 1085 matching lines @@
             'browser/renderer_host/input/touch_action_browsertest.cc',
             'browser/renderer_host/input/touch_input_browsertest.cc',
             'browser/renderer_host/render_process_host_browsertest.cc',
             'browser/renderer_host/render_view_host_browsertest.cc',
             'browser/renderer_host/render_widget_host_browsertest.cc',
             'browser/renderer_host/render_widget_host_view_browsertest.cc',
             'browser/security_exploit_browsertest.cc',
             'browser/service_worker/service_worker_browsertest.cc',
             'browser/session_history_browsertest.cc',
             'browser/site_per_process_browsertest.cc',
-            'browser/speech/input_tag_speech_browsertest.cc',
             'browser/speech/speech_recognition_browsertest.cc',
             'browser/tracing/tracing_controller_browsertest.cc',
             'browser/web_contents/opened_by_dom_browsertest.cc',
             'browser/web_contents/touch_editable_impl_aura_browsertest.cc',
             'browser/web_contents/web_contents_impl_browsertest.cc',
             'browser/web_contents/web_contents_view_aura_browsertest.cc',
             'browser/webkit_browsertest.cc',
             'browser/webui/web_ui_mojo_browsertest.cc',
             'browser/worker_host/test/worker_browsertest.cc',
             'child/site_isolation_policy_browsertest.cc',
@@ skipping 701 matching lines @@
                   'files': ['<(PRODUCT_DIR)/libnpapi_test_plugin.so'],
                 },
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }