Enables win64 build of yuv_convert_simd_x86 without rolling x86inc.asm forward.

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 971 matching lines @@
                     # gcc on the mac builds horribly unoptimized sse code in
                     # debug mode. Since this is rarely going to be debugged,
                     # run with full optimizations in Debug as well as Release.
                     'GCC_OPTIMIZATION_LEVEL': '3',  # -O3
                    },
                  },
               },
             }],
             [ 'OS=="win"', {
               'variables': {
-                'yasm_flags': [
-                  '-DWIN32',
-                  '-DMSVC',
-                  '-DCHROMIUM',
-                  '-Isimd',
+                'conditions': [
+                  [ 'target_arch=="ia32"', {
+                    'yasm_flags': [
+                      '-DCHROMIUM',
+                      '-Isimd',
+                    ],
+                  }, {
+                    'yasm_flags': [
+                      '-DARCH_X86_64',
+                      '-DCHROMIUM',
+                      '-Isimd',
+                    ],
+                  }],
                 ],
               },
             }],
             [ 'OS=="mac"', {
               'variables': {
                 'conditions': [
                   [ 'target_arch=="ia32"', {
                     'yasm_flags': [
                       '-DPREFIX',
                       '-DMACHO',
@@ skipping 335 matching lines @@
             'media',
           ],
           'sources': [
             'tools/media_bench/media_bench.cc',
           ],
         },
       ],
     }]
   ],
 }