Introducing SurfaceReferenceFactory

components/exo/surface.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_EXO_SURFACE_H_
 #define COMPONENTS_EXO_SURFACE_H_
 
 #include <list>
 #include <memory>
 #include <set>
@@ skipping 362 matching lines @@
     const char* name;
     int64_t value;
     PropertyDeallocator deallocator;
   };
 
   std::map<const void*, Value> prop_map_;
 
   // Surface observer list. Surface does not own the observers.
   base::ObserverList<SurfaceObserver, true> observers_;
 
+  // A reference factory that uses the compositor frame sink holder provided
+  // to this class to construct surface references. This object is passed to
+  // ui::Layer::SetShowSurface because the layer needs to know how to add
+  // references to surfaces.
+  scoped_refptr<cc::SurfaceReferenceFactory> surface_reference_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(Surface);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_SURFACE_H_