Clean up forward declarations in WebKit/Source

Source/web/WebLocalFrameImpl.h

 /*
  * 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:
  *
  *     * 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 31 matching lines @@
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ChromePrintContext;
 class GeolocationClientProxy;
 class IntSize;
 class KURL;
 class Range;
-class ScriptSourceCode;
 class SharedWorkerRepositoryClientImpl;
 class TextFinder;
 class WebAutofillClient;
 class WebDataSourceImpl;
 class WebFrameClient;
 class WebPerformance;
 class WebPlugin;
 class WebPluginContainerImpl;
 class WebScriptExecutionCallback;
 class WebView;
@@ skipping 307 matching lines @@
     GC_PLUGIN_IGNORE("340522")
     Persistent<WebLocalFrameImpl> m_selfKeepAlive;
 #endif
 };
 
 DEFINE_TYPE_CASTS(WebLocalFrameImpl, WebFrame, frame, frame->isWebLocalFrame(), frame.isWebLocalFrame());
 
 } // namespace blink
 
 #endif