Adding third_party/openh264/src, build files and unittests

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 1273 matching lines @@
                 '../ui/ozone/ozone.gyp:ozone',
                 '../ui/ozone/ozone.gyp:ozone_base',
               ],
             }],
             ['OS == "mac"', {
               'sources': [ '<@(content_unittests_mac_sources)' ],
               'dependencies': [
                 '../third_party/boringssl/boringssl.gyp:boringssl',
               ],
             }],
+            ['use_openh264==1', {
+              'sources': [
+                'browser/media/openh264_unittests.cc',
+              ],
+              'dependencies': [
+                '../third_party/openh264/testing/openh264_testing.gyp:openh264_testing',
+              ],
+            }],
           ],
         },
         {
           # GN version: //content/test:content_perftests
           'target_name': 'content_perftests',
           'type': '<(gtest_target_type)',
           'defines!': ['CONTENT_IMPLEMENTATION'],
           'dependencies': [
             'content.gyp:content_browser',
             'content.gyp:content_common',
@@ skipping 879 matching lines @@
                   'content_unittests_apk.isolate',
                 ],
               },
             ],
           },
         ],
       ],
     }],
   ],
 }