Remove duplicate CPU detection code; use base::CPU instead.

media/media.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # Override to dynamically link the PulseAudio library.
     'use_pulseaudio%': 0,
     # Override to dynamically link the cras (ChromeOS audio) library.
@@ skipping 427 matching lines @@
           'sources!': [
             'audio/pulse/pulse_output.cc',
             'audio/pulse/pulse_output.h',
             'video/capture/video_capture_device_dummy.cc',
             'video/capture/video_capture_device_dummy.h',
           ],
         }],
       ],
     },
     {
-      'target_name': 'cpu_features',
-      'type': 'static_library',
-      'include_dirs': [
-        '..',
-      ],
-      'conditions': [
-        [ 'target_arch == "ia32" or target_arch == "x64"', {
-          'sources': [
-            'base/cpu_features_x86.cc',
-          ],
-        }],
-        [ 'target_arch == "arm"', {
-          'sources': [
-            'base/cpu_features_arm.cc',
-          ],
-        }],
-      ],
-      'sources': [
-        'base/cpu_features.h',
-      ],
-    },
-    {
       'target_name': 'yuv_convert',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
-      'dependencies': [
-        'cpu_features',
-      ],
       'conditions': [
         ['order_profiling != 0', {
           'target_conditions' : [
             ['_toolset=="target"', {
               'cflags!': [ '-finstrument-functions' ],
             }],
           ],
         }],
         [ 'target_arch == "ia32" or target_arch == "x64"', {
           'dependencies': [
@@ skipping 596 matching lines @@
             '../third_party/ffmpeg/ffmpeg.gyp:ffmpeg',
           ],
           'sources': [
             'tools/media_bench/media_bench.cc',
           ],
         },
       ],
     }]
   ],
 }