Fix win64 builds for vp8.

libvpx.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': {
     'libvpx_build_vp9%': 1,
     'libvpx_source%': 'source/libvpx',
     'conditions': [
       ['os_posix==1', {
         'asm_obj_extension': 'o',
@@ skipping 35 matching lines @@
   },
   'target_defaults': {
     'target_conditions': [
       ['<(libvpx_build_vp9)==0', {
         'sources/': [ ['exclude', '(^|/)vp9/'], ],
       }],
     ],
     'variables': {
       'conditions': [
         ['OS=="win" and buildtype=="Official"', {
-          # Setting the optimizations to 'speed' or to 'max' results in a lot of
-          # unresolved symbols. The only supported mode is 'size' (see
-          # crbug.com/352476).
-          'optimize' :'size',
+          # Do not set to 'size', as it results in an error on win64. 
+          'optimize' :'speed',
         }],
       ],
     },
   },
   'conditions': [
     ['target_arch=="ia32"', {
       'includes': ['libvpx_srcs_x86_intrinsics.gypi', ],
     }],
     ['target_arch=="x64" and msan==0', {
       'includes': ['libvpx_srcs_x86_64_intrinsics.gypi', ],
@@ skipping 510 matching lines @@
          # Need this otherwise gyp won't run the rule on them.
           'sources': [
             '<(INTERMEDIATE_DIR)/vpx_scale_asm_offsets.o',
           ],
         }],
       ],
       'includes': ['obj_int_extract.gypi'],
     },
   ],
 }