Add shared bitmap managers for browser and renderer processes.

ui/compositor/compositor.h

Index: ui/compositor/compositor.h
diff --git a/ui/compositor/compositor.h b/ui/compositor/compositor.h
index 84ed365803cb7a9b46ee53045325e7df067a238a..8fa554c939d4f60a42394640883100b985e53912 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -33,6 +33,7 @@ class ContextProvider;
 class Layer;
 class LayerTreeDebugState;
 class LayerTreeHost;
+class SharedBitmapManager;
 }
 
 namespace gfx {
@@ -173,6 +174,7 @@ class COMPOSITOR_EXPORT Compositor
   static bool WasInitializedWithThread();
   static scoped_refptr<base::MessageLoopProxy> GetCompositorMessageLoop();
   static void Terminate();
+  static void SetSharedBitmapManager(cc::SharedBitmapManager* manager);
 
   // Schedules a redraw of the layer tree associated with this compositor.
   void ScheduleDraw();