Clean up forward declarations in Source/core/inspector

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 23 matching lines @@
 
 #include "core/InspectorFrontend.h"
 #include "core/inspector/InspectorBaseAgent.h"
 #include "core/inspector/InspectorResourceContentLoader.h"
 #include "wtf/HashMap.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Resource;
-class DOMWrapperWorld;
 class Document;
 class DocumentLoader;
 class LocalFrame;
 class GraphicsContext;
 class GraphicsLayer;
 class InjectedScriptManager;
 class InspectorClient;
 class InspectorOverlay;
 class InspectorResourceContentLoader;
-class InstrumentingAgents;
-class IntSize;
 class KURL;
 class LayoutRect;
 class Page;
 class RenderObject;
 class SharedBuffer;
 class StyleResolver;
 class TextResourceDecoder;
 
 typedef String ErrorString;
 
@@ skipping 161 matching lines @@
 
     OwnPtrWillBeMember<InspectorResourceContentLoader> m_inspectorResourceContentLoader;
     HashMap<String, String> m_editedResourceContent;
 };
 
 
 } // namespace blink
 
 
 #endif // !defined(InspectorPagerAgent_h)