Remove duplicated headers from core/

Source/core/platform/Pasteboard.cpp

 /*
  * Copyright (c) 2008, 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 26 matching lines @@
 #include "core/dom/Element.h"
 #include "core/fetch/ImageResource.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/platform/chromium/ChromiumDataObject.h"
 #include "core/platform/graphics/Image.h"
 #include "core/platform/graphics/skia/NativeImageSkia.h"
 #include "core/rendering/RenderImage.h"
 #include "platform/clipboard/ClipboardUtilities.h"
 #include "platform/weborigin/KURL.h"
 #include "public/platform/Platform.h"
-#include "public/platform/WebClipboard.h"
 #include "public/platform/WebDragData.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebURL.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 Pasteboard* Pasteboard::generalPasteboard()
 {
@@ skipping 100 matching lines @@
     String text = plainText;
 #if OS(WIN)
     replaceNewlinesWithWindowsStyleNewlines(text);
 #endif
     replaceNBSPWithSpace(text);
 
     blink::Platform::current()->clipboard()->writeHTML(markup, documentURL, text, canSmartCopyOrDelete);
 }
 
 } // namespace WebCore