Clean up forward declarations in Source/modules

Source/modules/webdatabase/InspectorDatabaseResource.h

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * Copyright (C) 2009 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
@@ skipping 20 matching lines @@
 #ifndef InspectorDatabaseResource_h
 #define InspectorDatabaseResource_h
 
 #include "core/InspectorFrontend.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 class Database;
-class InspectorFrontend;
 
 class InspectorDatabaseResource : public GarbageCollectedFinalized<InspectorDatabaseResource> {
 public:
     static InspectorDatabaseResource* create(Database*, const String& domain, const String& name, const String& version);
     void trace(Visitor*);
 
     void bind(InspectorFrontend::Database*);
     Database* database() { return m_database.get(); }
     void setDatabase(Database* database) { m_database = database; }
     String id() const { return m_id; }
 
 private:
     InspectorDatabaseResource(Database*, const String& domain, const String& name, const String& version);
 
     Member<Database> m_database;
     String m_id;
     String m_domain;
     String m_name;
     String m_version;
 };
 
 } // namespace blink
 
 #endif // InspectorDatabaseResource_h