Change transport dib API to not make copies of SharedMemoryHandle.

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/memory/shared_memory.h"
 #include "build/build_config.h"
@@ skipping 30 matching lines @@
  public:
   ~ImageData() override;
 
   // Resource overrides.
   ppapi::thunk::PPB_ImageData_API* AsPPB_ImageData_API() override;
   void LastPluginRefWasDeleted() override;
   void InstanceWasDeleted() override;
 
   // PPB_ImageData API.
   PP_Bool Describe(PP_ImageDataDesc* desc) override;
-  int32_t GetSharedMemory(base::SharedMemoryHandle* handle,
+  int32_t GetSharedMemory(base::SharedMemory** shm,
                           uint32_t* byte_count) override;
   void SetIsCandidateForReuse() override;
 
   PPB_ImageData_Shared::ImageDataType type() const { return type_; }
   const PP_ImageDataDesc& desc() const { return desc_; }
 
   // Prepares this image data to be recycled to the plugin. Clears the contents
   // if zero_contents is true.
   void RecycleToPlugin(bool zero_contents);
 
@@ skipping 122 matching lines @@
   // 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_