PPAPI/NaCl: Make NaClIPCAdapter transfer handles more generally

ppapi/proxy/ppb_image_data_proxy.h

 // 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.
 
 #ifndef PPAPI_PPB_IMAGE_DATA_PROXY_H_
 #define PPAPI_PPB_IMAGE_DATA_PROXY_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "build/build_config.h"
@@ skipping 106 matching lines @@
                        PP_Bool init_to_zero,
                        HostResource* result,
                        std::string* image_data_desc,
                        ImageHandle* result_image_handle);
   void OnHostMsgCreateNaCl(PP_Instance instance,
                            int32_t format,
                            const PP_Size& size,
                            PP_Bool init_to_zero,
                            HostResource* result,
                            std::string* image_data_desc,
-                           base::SharedMemoryHandle* result_image_handle);
+                           ppapi::proxy::SerializedHandle* result_image_handle);
 
   // Host->Plugin message handlers.
   void OnPluginMsgNotifyUnusedImageData(const HostResource& old_image_data);
 
   DISALLOW_COPY_AND_ASSIGN(PPB_ImageData_Proxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PPB_IMAGE_DATA_PROXY_H_