content: Cleanup GpuMemoryBufferImpl destruction.

content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h

Index: content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h b/content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h
index 911a37e94bbd32cd98c8c19677206903059040f9..c4b28ee72c50d508650a63ab42fe93b95c3d9aa9 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_io_surface.h
@@ -15,7 +15,9 @@ namespace content {
 // Implementation of GPU memory buffer based on IO surfaces.
 class GpuMemoryBufferImplIOSurface : public GpuMemoryBufferImpl {
  public:
-  GpuMemoryBufferImplIOSurface(const gfx::Size& size, unsigned internalformat);
+  GpuMemoryBufferImplIOSurface(const gfx::Size& size,
+                               unsigned internalformat,
+                               const DestructionCallback& callback);
   virtual ~GpuMemoryBufferImplIOSurface();
 
   static bool IsFormatSupported(unsigned internalformat);
@@ -32,6 +34,7 @@ class GpuMemoryBufferImplIOSurface : public GpuMemoryBufferImpl {
   virtual gfx::GpuMemoryBufferHandle GetHandle() const OVERRIDE;
 
  private:
+  const DestructionCallback callback_;
   base::ScopedCFTypeRef<IOSurfaceRef> io_surface_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImplIOSurface);