Add template SyncCall() to PluginResource.

ppapi/ppapi_proxy.gypi

 # 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.
 
 {
   'target_defaults': {
     'variables': {
       'ppapi_proxy_target': 0,
     },
     'target_conditions': [
@@ skipping 42 matching lines @@
           'proxy/plugin_resource.cc',
           'proxy/plugin_resource.h',
           'proxy/plugin_resource_tracker.cc',
           'proxy/plugin_resource_tracker.h',
           'proxy/plugin_var_serialization_rules.cc',
           'proxy/plugin_var_serialization_rules.h',
           'proxy/plugin_var_tracker.cc',
           'proxy/plugin_var_tracker.h',
           'proxy/ppapi_command_buffer_proxy.h',
           'proxy/ppapi_command_buffer_proxy.cc',
+          'proxy/ppapi_message_utils.h',
           'proxy/ppb_audio_input_proxy.cc',
           'proxy/ppb_audio_input_proxy.h',
           'proxy/ppb_audio_proxy.cc',
           'proxy/ppb_audio_proxy.h',
           'proxy/ppb_broker_proxy.cc',
           'proxy/ppb_broker_proxy.h',
           'proxy/ppb_buffer_proxy.cc',
           'proxy/ppb_buffer_proxy.h',
           'proxy/ppb_core_proxy.cc',
           'proxy/ppb_core_proxy.h',
@@ skipping 114 matching lines @@
               'proxy/ppp_content_decryptor_private_proxy.cc',
               'proxy/ppp_instance_private_proxy.cc',
               'proxy/ppp_video_decoder_proxy.cc',
             ],
           }],
         ],
       }],
     ],
   },
 }