pepper: parse context creation attrib list on the plugin side

gpu/command_buffer/command_buffer.gyp

Index: gpu/command_buffer/command_buffer.gyp
diff --git a/gpu/command_buffer/command_buffer.gyp b/gpu/command_buffer/command_buffer.gyp
index f8a45ef8b744796cf3da52cfeef8e68f0d4cc8dd..0a6405210d2027cf9b3910e0b95bb9b7ceee0ce2 100644
--- a/gpu/command_buffer/command_buffer.gyp
+++ b/gpu/command_buffer/command_buffer.gyp
@@ -26,5 +26,34 @@
       ],
     },
   ],
+  'conditions': [
+    ['disable_nacl!=1 and OS=="win" and target_arch=="ia32"', {
+      'targets': [
+        {
+          'target_name': 'gles2_utils_win64',
+          'type': '<(component)',
+          'variables': {
+            'gles2_utils_target': 1,
+          },
+          'dependencies': [
+            '../../base/base.gyp:base_win64',
+            '../../ui/gfx/gfx.gyp:gfx_geometry_win64',
+            '../../third_party/khronos/khronos.gyp:khronos_headers',
+          ],
+          'export_dependent_settings': [
+            '../../base/base.gyp:base_win64',
+          ],
+          'defines': [
+            '<@(nacl_win64_defines)',
+          ],
+          'configurations': {
+            'Common_Base': {
+              'msvs_target_platform': 'x64',
+            },
+          },
+        },
+      ],
+    }],
+  ],
 }