Revert of Revert of Implement software fallback for PPB_VideoDecoder.

gpu/gpu.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': {
     'nacl_win64_target': 0,
   },
   'includes': [
     'gpu_common.gypi',
@@ skipping 549 matching lines @@
           'type': 'none',
           'dependencies': [
             'gpu',
           ],
         },
       ],
     }],
     ['disable_nacl!=1 and OS=="win" and target_arch=="ia32"', {
       'targets': [
         {
-          'target_name': 'gpu_ipc_win64',
+          'target_name': 'command_buffer_common_win64',
           'type': 'static_library',
           'variables': {
             'nacl_win64_target': 1,
           },
           'includes': [
-            'gpu_ipc.gypi',
+            'command_buffer_common.gypi',
           ],
           'dependencies': [
             '../base/base.gyp:base_win64',
-            '../ipc/ipc.gyp:ipc_win64',
           ],
           'defines': [
             '<@(nacl_win64_defines)',
             'GPU_IMPLEMENTATION',
           ],
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },
+        {
+          'target_name': 'gpu_ipc_win64',
+          'type': 'static_library',
+          'variables': {
+            'nacl_win64_target': 1,
+          },
+          'includes': [
+            'gpu_ipc.gypi',
+          ],
+          'dependencies': [
+            '../base/base.gyp:base_win64',
+            '../ipc/ipc.gyp:ipc_win64',
+            'command_buffer_common_win64',
+          ],
+          'defines': [
+            '<@(nacl_win64_defines)',
+            'GPU_IMPLEMENTATION',
+          ],
+          'configurations': {
+            'Common_Base': {
+              'msvs_target_platform': 'x64',
+            },
+          },
+        },
       ],
     }],
     ['OS == "android"', {
       'targets': [
         {
           'target_name': 'gl_tests_apk',
           'type': 'none',
           'dependencies': [
             'gl_tests',
           ],
@@ skipping 12 matching lines @@
           ],
           'variables': {
             'test_suite_name': 'gpu_unittests',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }