Update gyp to support SSSE3/SSE4 compile checks.

skia/skia_library_opts.gyp

 # Copyright 2013 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.
 
 
 # This gyp file contains the platform-specific optimizations for Skia
 {
   'targets': [
     # Due to an unfortunate intersection of lameness between gcc and gyp,
     # we have to build the *_SSE2.cpp files in a separate target.  The
@@ skipping 185 matching lines @@
         }],
         [ 'OS == "win"', {
           'include_dirs': [
             'config/win',
           ],
           'direct_dependent_settings': {
             'include_dirs': [
               'config/win',
             ],
           },
+          'defines' : [
+            'SK_CPU_SSE_LEVEL=31'
+          ],
         }],
         [ 'target_arch != "arm" and target_arch != "arm64" and \
            target_arch != "mipsel"', {
           'sources': [
             '../third_party/skia/src/opts/SkBitmapProcState_opts_SSSE3.cpp',
           ],
         }],
       ],
     },
     # For the same lame reasons as what is done for skia_opts, we also have to
@@ skipping 17 matching lines @@
         [ 'OS in ["linux", "freebsd", "openbsd", "solaris", "android"]', {
           'cflags': [
             '-msse4.1',
           ],
         }],
         [ 'OS == "mac"', {
           'xcode_settings': {
             'GCC_ENABLE_SSE41_EXTENSIONS': 'YES',
           },
         }],
+        [ 'OS == "win"', {
+          'defines' : [
+            'SK_CPU_SSE_LEVEL=41'
+          ],
+        }],
         [ 'target_arch == "x64"', {
           'sources': [
             '../third_party/skia/src/opts/SkBlitRow_opts_SSE4_x64_asm.S',
           ],
         }],
         [ 'target_arch == "ia32"', {
           'sources': [
             '../third_party/skia/src/opts/SkBlitRow_opts_SSE4_asm.S',
           ],
        }],
@@ skipping 81 matching lines @@
               'defines': [
                 '__ARM_HAVE_OPTIONAL_NEON_SUPPORT',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }