pepper: parse context creation attrib list on the plugin side

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,
     'build_angle_deqp_tests%': 0,
   },
   'includes': [
@@ skipping 893 matching lines @@
           'type': 'static_library',
           'variables': {
             'nacl_win64_target': 1,
           },
           'includes': [
             'command_buffer_traits.gypi',
           ],
           'dependencies': [
             '../base/base.gyp:base_win64',
             '../ipc/ipc.gyp:ipc_win64',
+            '../ui/gfx/ipc/geometry/gfx_ipc_geometry.gyp:gfx_ipc_geometry_win64',
+            'command_buffer/command_buffer.gyp:gles2_utils_win64',
             'command_buffer_common_win64',
           ],
           'defines': [
-            '<@(nacl_win64_defines)',
-            'GPU_IMPLEMENTATION',
-          ],
-          'configurations': {
-            'Common_Base': {
-              'msvs_target_platform': 'x64',
-            },
-          },
-        },
-        {
-          'target_name': 'gpu_ipc_common_win64',
-          'type': 'static_library',
-          'variables': {
-            'nacl_win64_target': 1,
-          },
-          'includes': [
-            'command_buffer_traits.gypi',
-            'gpu_ipc_common.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',
             },
           },
         },
       ],
@@ skipping 261 matching lines @@
             ],
             'sources': [
               'gpu_unittests_apk.isolate',
             ],
           },
         ],
       },
     ],
   ],
 }