gpu: Associate all GpuMemoryBuffers with unique IDs.

content/common/gpu/client/gpu_channel_host.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 CONTENT_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_
 #define CONTENT_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 135 matching lines @@
   base::SharedMemoryHandle ShareToGpuProcess(
       base::SharedMemoryHandle source_handle);
 
   // Reserve one unused transfer buffer ID.
   int32 ReserveTransferBufferId();
 
   // Returns a GPU memory buffer handle to the buffer that can be sent via
   // IPC to the GPU process. The caller is responsible for ensuring it is
   // closed. Returns an invalid handle on failure.
   gfx::GpuMemoryBufferHandle ShareGpuMemoryBufferToGpuProcess(
-      gfx::GpuMemoryBufferHandle source_handle,
+      const gfx::GpuMemoryBufferHandle& source_handle,
       bool* requires_sync_point);
 
   // Reserve one unused image ID.
   int32 ReserveImageId();
 
   // Generate a route ID guaranteed to be unique for this channel.
   int32 GenerateRouteID();
 
  private:
   friend class base::RefCountedThreadSafe<GpuChannelHost>;
@@ skipping 75 matching lines @@
   // Used to look up a proxy from its routing id.
   typedef base::hash_map<int, CommandBufferProxyImpl*> ProxyMap;
   ProxyMap proxies_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_GPU_CHANNEL_HOST_H_