Convert enable_mpeg2ts into a new-style buildflag

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.
 
 {
   'variables': {
     'layouttest_support_content_sources': [
       'public/test/layouttest_support.h',
       'public/test/nested_message_pump_android.cc',
       'public/test/nested_message_pump_android.h',
@@ skipping 1491 matching lines @@
               'resource_include_dirs': [
                 '<(SHARED_INTERMEDIATE_DIR)/webkit',
               ],
               'sources': [
                 '<@(content_browsertests_win_sources)',
                 'shell/app/resource.h',
                 'shell/app/shell.rc',
               ],
               'dependencies': [
                 '<(DEPTH)/content/app/strings/content_strings.gyp:content_strings',
+                '<(DEPTH)/media/media.gyp:media_features',
                 '<(DEPTH)/net/net.gyp:net_resources',
                 '<(DEPTH)/third_party/WebKit/public/blink_resources.gyp:blink_resources',
                 '<(DEPTH)/third_party/iaccessible2/iaccessible2.gyp:iaccessible2',
                 '<(DEPTH)/third_party/isimpledom/isimpledom.gyp:isimpledom',
               ],
               'configurations': {
                 'Debug_Base': {
                   'msvs_settings': {
                     'VCLinkerTool': {
                       'LinkIncremental': '<(msvs_large_module_debug_link_mode)',
@@ skipping 693 matching lines @@
                   'content_unittests_apk.isolate',
                 ],
               },
             ],
           },
         ],
       ],
     }],
   ],
 }