Add multi-planar functions to GpuMemoryBuffer

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 scoped_ptr<GpuMemoryBufferImpl> CreateFromHandle(
       const gfx::GpuMemoryBufferHandle& handle,
       const gfx::Size& size,
       Format format,
       const DestructionCallback& callback);
 
   // Overridden from gfx::GpuMemoryBuffer:
-  void* Map() override;
+  bool Map(void** data) override;
   void Unmap() override;
-  uint32 GetStride() const override;
+  void GetStride(uint32* stride) const override;
   gfx::GpuMemoryBufferHandle GetHandle() const override;
 
  private:
   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_