gpu: Compositor management of GpuMemoryBuffer instances.

ui/compositor/compositor.h

Index: ui/compositor/compositor.h
diff --git a/ui/compositor/compositor.h b/ui/compositor/compositor.h
index d808f621d1d8e336c60978ab4dfcae089cfed14b..946ab3a015daee6cb107be35f305bdf3f13f7731 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -33,6 +33,7 @@ class RunLoop;
 
 namespace cc {
 class ContextProvider;
+class GpuMemoryBufferManager;
 class Layer;
 class LayerTreeDebugState;
 class LayerTreeHost;
@@ -92,6 +93,9 @@ class COMPOSITOR_EXPORT ContextFactory {
   // Gets the shared bitmap manager for software mode.
   virtual cc::SharedBitmapManager* GetSharedBitmapManager() = 0;
 
+  // Gets the GPU memory buffer manager.
+  virtual cc::GpuMemoryBufferManager* GetGpuMemoryBufferManager() = 0;
+
   // Gets the compositor message loop, or NULL if not using threaded
   // compositing.
   virtual base::MessageLoopProxy* GetCompositorMessageLoop() = 0;