Revert of Remove accelerated hardware decode blacklist entry for Mac OS X.

chrome/browser/about_flags.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 898 matching lines @@
     "disable-display-color-calibration",
     IDS_FLAGS_DISABLE_DISPLAY_COLOR_CALIBRATION_NAME,
     IDS_FLAGS_DISABLE_DISPLAY_COLOR_CALIBRATION_DESCRIPTION,
     kOsCrOS,
     SINGLE_VALUE_TYPE(ui::switches::kDisableDisplayColorCalibration),
   },
 #endif  // defined(OS_CHROMEOS)
   { "disable-accelerated-video-decode",
     IDS_FLAGS_DISABLE_ACCELERATED_VIDEO_DECODE_NAME,
     IDS_FLAGS_DISABLE_ACCELERATED_VIDEO_DECODE_DESCRIPTION,
-    kOsMac | kOsWin | kOsCrOS,
+    kOsWin | kOsCrOS,
     SINGLE_VALUE_TYPE(switches::kDisableAcceleratedVideoDecode),
   },
 #if defined(USE_ASH)
   {
     "ash-debug-shortcuts",
     IDS_FLAGS_DEBUG_SHORTCUTS_NAME,
     IDS_FLAGS_DEBUG_SHORTCUTS_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(ash::switches::kAshDebugShortcuts),
   },
@@ skipping 1761 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags