gpu: Associate all GpuMemoryBuffers with unique IDs.

content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h

 // 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.
 
 #ifndef CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_IO_SURFACE_H_
 #define CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_IO_SURFACE_H_
 
 #include <IOSurface/IOSurfaceAPI.h>
 
 #include "base/mac/scoped_cftyperef.h"
 #include "content/common/gpu/client/gpu_memory_buffer_impl.h"
 
 namespace content {
 
 // Implementation of GPU memory buffer based on IO surfaces.
 class GpuMemoryBufferImplIOSurface : public GpuMemoryBufferImpl {
  public:
-  static void Create(const gfx::Size& size,
+  static void Create(gfx::GpuMemoryBufferId id,
+                     const gfx::Size& size,
                      Format format,
                      int client_id,
                      const CreationCallback& callback);
 
-  static void AllocateForChildProcess(const gfx::Size& size,
+  static void AllocateForChildProcess(gfx::GpuMemoryBufferId id,
+                                      const gfx::Size& size,
                                       Format format,
                                       int child_client_id,
                                       const AllocationCallback& callback);
 
   static scoped_ptr<GpuMemoryBufferImpl> CreateFromHandle(
       const gfx::GpuMemoryBufferHandle& handle,
       const gfx::Size& size,
       Format format,
       const DestructionCallback& callback);
 
   static bool IsFormatSupported(Format format);
   static bool IsUsageSupported(Usage usage);
   static bool IsConfigurationSupported(Format format, Usage usage);
   static uint32 PixelFormat(Format format);
 
   // Overridden from gfx::GpuMemoryBuffer:
   void* Map() override;
   void Unmap() override;
   uint32 GetStride() const override;
   gfx::GpuMemoryBufferHandle GetHandle() const override;
 
  private:
-  GpuMemoryBufferImplIOSurface(const gfx::Size& size,
+  GpuMemoryBufferImplIOSurface(gfx::GpuMemoryBufferId id,
+                               const gfx::Size& size,
                                Format format,
                                const DestructionCallback& callback,
                                IOSurfaceRef io_surface);
   ~GpuMemoryBufferImplIOSurface() override;
 
   base::ScopedCFTypeRef<IOSurfaceRef> io_surface_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImplIOSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_IO_SURFACE_H_