Remove more oilpan.

sky/engine/core/html/canvas/WebGLRenderbuffer.h

 /*
  * Copyright (C) 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 11 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebGLRenderbuffer_h
 #define WebGLRenderbuffer_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/html/canvas/WebGLSharedObject.h"
 #include "wtf/PassRefPtr.h"
+#include "wtf/RefPtr.h"
 
 namespace blink {
 
 class WebGLRenderbuffer final : public WebGLSharedObject, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~WebGLRenderbuffer();
 
     static PassRefPtr<WebGLRenderbuffer> create(WebGLRenderingContextBase*);
 
@@ skipping 33 matching lines @@
     GLsizei m_width, m_height;
 
     bool m_hasEverBeenBound;
 
     RefPtr<WebGLRenderbuffer> m_emulatedStencilBuffer;
 };
 
 } // namespace blink
 
 #endif // WebGLRenderbuffer_h