Inspector: Removed unused references to InspectorAgent

Source/core/inspector/InspectorApplicationCacheAgent.h

 /*
  * Copyright (C) 2010 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 18 matching lines @@
 #include "InspectorFrontend.h"
 #include "core/inspector/InspectorBaseAgent.h"
 #include "core/loader/appcache/ApplicationCacheHost.h"
 #include <wtf/Noncopyable.h>
 #include <wtf/PassOwnPtr.h>
 
 namespace WebCore {
 
 class Frame;
 class InspectorArray;
-class InspectorAgent;
 class InspectorFrontend;
 class InspectorObject;
 class InspectorPageAgent;
 class InspectorValue;
 class InspectorState;
 class InstrumentingAgents;
 class Page;
 class ResourceResponse;
 
 typedef String ErrorString;
@@ skipping 30 matching lines @@
 
     DocumentLoader* assertFrameWithDocumentLoader(ErrorString*, String frameId);
 
     InspectorPageAgent* m_pageAgent;
     InspectorFrontend::ApplicationCache* m_frontend;
 };
 
 } // namespace WebCore
 
 #endif // InspectorApplicationCacheAgent_h