Introducing SurfaceReferenceFactory

cc/surfaces/surface_manager.h

Index: cc/surfaces/surface_manager.h
diff --git a/cc/surfaces/surface_manager.h b/cc/surfaces/surface_manager.h
index b52fce25adef17a8d5ac2fbe2611a20b61bc00d2..7292390fcd30735b589a938e6d4afea5d90aa1e9 100644
--- a/cc/surfaces/surface_manager.h
+++ b/cc/surfaces/surface_manager.h
@@ -19,6 +19,7 @@
 #include "cc/surfaces/frame_sink_id.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_observer.h"
+#include "cc/surfaces/surface_ref.h"
 #include "cc/surfaces/surface_sequence.h"
 #include "cc/surfaces/surfaces_export.h"
 
@@ -120,6 +121,10 @@ class CC_SURFACES_EXPORT SurfaceManager {
 
   const SurfaceId& GetRootSurfaceId() { return kRootSurfaceId; }
 
+  SurfaceRefPtr NewSurfaceRef(const SurfaceId& surface_id,
+                              float scale,
+                              const gfx::Size& size);
+
  private:
   void RecursivelyAttachBeginFrameSource(const FrameSinkId& frame_sink_id,
                                          BeginFrameSource* source);