Replacing SurfaceReferenceBase and SequenceSurfaceReference with Closures

cc/surfaces/sequence_surface_reference_factory.h

Index: cc/surfaces/sequence_surface_reference_factory.h
diff --git a/cc/surfaces/sequence_surface_reference_factory.h b/cc/surfaces/sequence_surface_reference_factory.h
index ff0e9e3ef68a72ec1e0376bdaa26f9eeadb07122..93680a9718e28aedf6291f144cf74e243596e7be 100644
--- a/cc/surfaces/sequence_surface_reference_factory.h
+++ b/cc/surfaces/sequence_surface_reference_factory.h
@@ -5,8 +5,7 @@
 #ifndef CC_SURFACES_SEQUENCE_SURFACE_REFERENCE_FACTORY_H_
 #define CC_SURFACES_SEQUENCE_SURFACE_REFERENCE_FACTORY_H_
 
-#include "cc/output/compositor_frame_metadata.h"
-#include "cc/surfaces/surface_reference_base.h"
+#include "cc/surfaces/scoped_surface_reference_base.h"
 #include "cc/surfaces/surface_reference_factory.h"
 #include "cc/surfaces/surfaces_export.h"
 
@@ -19,7 +18,7 @@ class CC_SURFACES_EXPORT SequenceSurfaceReferenceFactory
  public:
   SequenceSurfaceReferenceFactory() = default;
 
-  std::unique_ptr<SurfaceReferenceBase> CreateReference(
+  std::unique_ptr<ScopedSurfaceReferenceBase> CreateReference(
       SurfaceReferenceOwner* owner,
       const SurfaceId& surface_id) const override;
 
@@ -32,7 +31,7 @@ class CC_SURFACES_EXPORT SequenceSurfaceReferenceFactory
   virtual void SatisfySequence(const SurfaceSequence& sequence) const = 0;
 
   // SurfaceReferenceFactory implementation:
-  void DestroyReference(SurfaceReferenceBase* surface_ref) const override;
+  void DestroyReference(ScopedSurfaceReferenceBase* surface_ref) const override;
 
   DISALLOW_COPY_AND_ASSIGN(SequenceSurfaceReferenceFactory);
 };