Reland: H264 HW encode using VideoToolbox

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 1797 matching lines @@
                 ]
               }, {
                 'dependencies': [
                   '../build/linux/system.gyp:libdrm',
                 ]
               }],
             ],
           }
         ]
     }],
-    ['chromeos==1', {
+    ['chromeos==1 or OS=="mac"', {
       'targets': [
         {
           'target_name': 'video_encode_accelerator_unittest',
           'type': 'executable',
           'dependencies': [
+            'content.gyp:content_common',
             '../base/base.gyp:base',
             '../media/media.gyp:media',
             '../media/media.gyp:media_test_support',
             '../testing/gtest.gyp:gtest',
             '../ui/base/ui_base.gyp:ui_base',
             '../ui/gfx/gfx.gyp:gfx',
             '../ui/gfx/gfx.gyp:gfx_geometry',
             '../ui/gfx/gfx.gyp:gfx_test_support',
             '../ui/gl/gl.gyp:gl',
             '../ui/gl/gl.gyp:gl_test_support',
@@ skipping 12 matching lines @@
               'dependencies': [
                 '../ui/gfx/x/gfx_x11.gyp:gfx_x11',
               ],
             }],
             ['use_ozone==1', {
               'dependencies': [
                 '../ui/ozone/ozone.gyp:ozone',
               ],
             }],
           ],
-        },
+        }
+      ]
+    }],
+    ['chromeos==1', {
+      'targets': [
         {
           'target_name': 'jpeg_decode_accelerator_unittest',
           'type': 'executable',
           'dependencies': [
             '../base/base.gyp:base',
             '../media/media.gyp:media',
             '../media/media.gyp:media_test_support',
             '../testing/gtest.gyp:gtest',
             '../third_party/libyuv/libyuv.gyp:libyuv',
             '../ui/gfx/gfx.gyp:gfx',
@@ skipping 377 matching lines @@
                   'content_unittests_apk.isolate',
                 ],
               },
             ],
           },
         ],
       ],
     }],
   ],
 }