Clean up forward declarations in Source/core/inspector

Source/core/inspector/InspectorHeapProfilerAgent.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
@@ skipping 26 matching lines @@
 #include "wtf/HashMap.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class InjectedScriptManager;
 class HeapStatsUpdateTask;
-class ScriptHeapSnapshot;
 
 typedef String ErrorString;
 
 class InspectorHeapProfilerAgent final : public InspectorBaseAgent<InspectorHeapProfilerAgent>, public InspectorBackendDispatcher::HeapProfilerCommandHandler {
     WTF_MAKE_NONCOPYABLE(InspectorHeapProfilerAgent);
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
     static PassOwnPtrWillBeRawPtr<InspectorHeapProfilerAgent> create(InjectedScriptManager*);
     virtual ~InspectorHeapProfilerAgent();
     virtual void trace(Visitor*) override;
@@ skipping 29 matching lines @@
     RawPtrWillBeMember<InjectedScriptManager> m_injectedScriptManager;
     InspectorFrontend::HeapProfiler* m_frontend;
     unsigned m_nextUserInitiatedHeapSnapshotNumber;
     OwnPtrWillBeMember<HeapStatsUpdateTask> m_heapStatsUpdateTask;
 };
 
 } // namespace blink
 
 
 #endif // !defined(InspectorHeapProfilerAgent_h)