Cleanup: Remove unneeded SSE2 checks and unused code.

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 cras (ChromeOS audio) library.
     'use_cras%': 0,
     # Option e.g. for Linux distributions to link pulseaudio directly
@@ skipping 1395 matching lines @@
     },
   ],
   'conditions': [
     ['target_arch!="arm"', {
       'targets': [
        {
           'target_name': 'media_asm',
           'type': 'static_library',
           'sources': [
             'base/simd/convert_rgb_to_yuv_ssse3.asm',
-            'base/simd/convert_yuv_to_rgb_mmx.asm',
             'base/simd/convert_yuv_to_rgb_sse.asm',
             'base/simd/convert_yuva_to_argb_mmx.asm',
             'base/simd/empty_register_state_mmx.asm',
             'base/simd/linear_scale_yuv_to_rgb_mmx.asm',
             'base/simd/linear_scale_yuv_to_rgb_sse.asm',
             'base/simd/scale_yuv_to_rgb_mmx.asm',
             'base/simd/scale_yuv_to_rgb_sse.asm',
           ],
           'conditions': [
             ['component=="shared_library"', {
@@ skipping 318 matching lines @@
                   ],
                 }],
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }