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 c481dc93c8a676bebbf28cdc7185d86606960b9b..3ec5657a2f08917b1888449f50ca1c540c2f03e0 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -37,6 +37,7 @@ class ContextProvider;
 class Layer;
 class LayerTreeDebugState;
 class LayerTreeHost;
+class SharedBitmapManager;
 }
 
 namespace gfx {
@@ -177,6 +178,7 @@ 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();