Introduce RawVarData and associated classes for serializing PP_Vars

ppapi/ppapi_ipc.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': {
       'nacl_win64_target': 0,
       'ppapi_ipc_target': 0,
     },
     'target_conditions': [
       # This part is shared between the targets defined below.
       ['ppapi_ipc_target==1', {
         'sources': [
           'proxy/handle_converter.cc',
           'proxy/handle_converter.h',
           'proxy/ppapi_messages.cc',
           'proxy/ppapi_messages.h',
           'proxy/ppapi_param_traits.cc',
           'proxy/ppapi_param_traits.h',
+          'proxy/raw_var_data.cc',
+          'proxy/raw_var_data.h',
           'proxy/resource_message_params.cc',
           'proxy/resource_message_params.h',
           'proxy/serialized_flash_menu.cc',
           'proxy/serialized_flash_menu.h',
           'proxy/serialized_handle.cc',
           'proxy/serialized_handle.h',
           'proxy/serialized_structs.cc',
           'proxy/serialized_structs.h',
           'proxy/serialized_var.cc',
           'proxy/serialized_var.h',
           'proxy/var_serialization_rules.h',
         ],
         'include_dirs': [
           '..',
         ],
         'target_conditions': [
           ['>(nacl_untrusted_build)==1 or >(nacl_win64_target)==1', {
             'sources!': [
               'proxy/serialized_flash_menu.cc',
             ],
           }],
         ],
       }],
     ],
   },
 }