Clean up forward declarations in WebKit/Source

Source/bindings/core/v8/V8Binding.h

 /*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 * Copyright (C) 2012 Ericsson AB. 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.
@@ skipping 32 matching lines @@
 #include "bindings/core/v8/V8StringResource.h"
 #include "bindings/core/v8/V8ThrowException.h"
 #include "bindings/core/v8/V8ValueCache.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/AtomicString.h"
 #include <v8.h>
 
 namespace blink {
 
 class DOMWindow;
-class Document;
 class EventListener;
 class ExecutionContext;
 class ExceptionState;
 class Frame;
 class LocalDOMWindow;
 class LocalFrame;
 class NodeFilter;
 class XPathNSResolver;
 
 namespace TraceEvent {
@@ skipping 891 matching lines @@
 
 private:
     v8::TryCatch& m_block;
 };
 
 typedef void (*InstallTemplateFunction)(v8::Handle<v8::FunctionTemplate>, v8::Isolate*);
 
 } // namespace blink
 
 #endif // V8Binding_h