gpu: Directly cast ClientBuffer to gfx::GpuMemoryBuffer

gpu/command_buffer/service/in_process_command_buffer.cc

 // Copyright 2013 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.
 
 #include "gpu/command_buffer/service/in_process_command_buffer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <queue>
@@ skipping 660 matching lines @@
 }
 
 int32_t InProcessCommandBuffer::CreateImage(ClientBuffer buffer,
                                             size_t width,
                                             size_t height,
                                             unsigned internalformat) {
   CheckSequencedThread();
 
   DCHECK(gpu_memory_buffer_manager_);
   gfx::GpuMemoryBuffer* gpu_memory_buffer =
-      gpu_memory_buffer_manager_->GpuMemoryBufferFromClientBuffer(buffer);
+      reinterpret_cast<gfx::GpuMemoryBuffer*>(buffer);
   DCHECK(gpu_memory_buffer);
 
   int32_t new_id = next_image_id_.GetNext();
 
   DCHECK(gpu::IsGpuMemoryBufferFormatSupported(gpu_memory_buffer->GetFormat(),
                                                capabilities_));
   DCHECK(gpu::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
       internalformat, gpu_memory_buffer->GetFormat()));
 
   // This handle is owned by the GPU thread and must be passed to it or it
@@ skipping 367 matching lines @@
     framebuffer_completeness_cache_ =
         new gpu::gles2::FramebufferCompletenessCache;
   return framebuffer_completeness_cache_;
 }
 
 SyncPointManager* GpuInProcessThread::sync_point_manager() {
   return sync_point_manager_;
 }
 
 }  // namespace gpu