Remove more #includes from Frame.h

Source/core/inspector/InspectorPageAgent.h

 /*
  * Copyright (C) 2011 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
@@ skipping 31 matching lines @@
 #include <wtf/Vector.h>
 #include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
 class CachedResource;
 class DOMWrapperWorld;
 class DocumentLoader;
 class Frame;
 class Frontend;
+class GraphicsContext;
 class InjectedScriptManager;
 class InspectorAgent;
 class InspectorArray;
 class InspectorClient;
 class InspectorObject;
 class InspectorOverlay;
 class InspectorState;
 class InstrumentingAgents;
 class KURL;
 class Page;
@@ skipping 145 matching lines @@
     RefPtr<GeolocationPosition> m_geolocationPosition;
     RefPtr<GeolocationPosition> m_platformGeolocationPosition;
     RefPtr<DeviceOrientationData> m_deviceOrientation;
 };
 
 
 } // namespace WebCore
 
 
 #endif // !defined(InspectorPagerAgent_h)