Use refs for GraphicsContext

third_party/WebKit/Source/platform/graphics/GraphicsContextStateSaver.h

 // Copyright (C) 2013 Google Inc. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //    * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //    * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
@@ skipping 57 matching lines @@
         save();
     }
 
     void restore()
     {
         ASSERT(m_saveAndRestore);
         m_context.restore();
         m_saveAndRestore = false;
     }
 
-    GraphicsContext* context() const { return &m_context; }
+    GraphicsContext& context() const { return m_context; }
     bool saved() const { return m_saveAndRestore; }
 
 private:
     GraphicsContext& m_context;
     bool m_saveAndRestore;
 };
 
 } // namespace blink
 
 #endif // GraphicsContextStateSaver_h