Clean up forward declarations in Source/modules

Source/modules/webdatabase/InspectorDatabaseAgent.h

 /*
  * Copyright (C) 2010 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:
  *
  * 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
@@ skipping 13 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (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 InspectorDatabaseAgent_h
 #define InspectorDatabaseAgent_h
 
 #include "core/InspectorFrontend.h"
 #include "core/inspector/InspectorBaseAgent.h"
-#include "platform/heap/Handle.h"
-#include "wtf/HashMap.h"
-#include "wtf/PassOwnPtr.h"
-#include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Database;
-class DocumentLoader;
-class LocalFrame;
 class InspectorDatabaseResource;
 class InspectorFrontend;
-class InstrumentingAgents;
 
 typedef String ErrorString;
 
 class InspectorDatabaseAgent final : public InspectorBaseAgent<InspectorDatabaseAgent>, public InspectorBackendDispatcher::DatabaseCommandHandler {
 public:
     static PassOwnPtrWillBeRawPtr<InspectorDatabaseAgent> create()
     {
         return adoptPtrWillBeNoop(new InspectorDatabaseAgent());
     }
     virtual ~InspectorDatabaseAgent();
@@ skipping 20 matching lines @@
 
     InspectorFrontend::Database* m_frontend;
     typedef PersistentHeapHashMapWillBeHeapHashMap<String, Member<InspectorDatabaseResource> > DatabaseResourcesHeapMap;
     DatabaseResourcesHeapMap m_resources;
     bool m_enabled;
 };
 
 } // namespace blink
 
 #endif // !defined(InspectorDatabaseAgent_h)