Remove duplicated headers

Source/web/WebPageSerializerImpl.cpp

 /*
  * 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 74 matching lines @@
 #include "core/dom/DocumentType.h"
 #include "core/dom/Element.h"
 #include "core/editing/markup.h"
 #include "core/html/HTMLAllCollection.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/HTMLFormElement.h"
 #include "core/html/HTMLHtmlElement.h"
 #include "core/html/HTMLMetaElement.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
-#include "public/platform/WebURL.h"
 #include "public/platform/WebVector.h"
 #include "weborigin/KURL.h"
 #include "wtf/text/TextEncoding.h"
 
 using namespace WebCore;
 
 namespace blink {
 
 // Maximum length of data buffer which is used to temporary save generated
 // html content data. This is a soft limit which might be passed if a very large
@@ skipping 414 matching lines @@
 
         encodeAndFlushBuffer(WebPageSerializerClient::CurrentFrameIsFinished, &param, ForceFlush);
     }
 
     ASSERT(m_dataBuffer.isEmpty());
     m_client->didSerializeDataForFrame(KURL(), WebCString("", 0), WebPageSerializerClient::AllFramesAreFinished);
     return didSerialization;
 }
 
 }  // namespace blink