Fixed WebDragData's wrong dependency.

Source/core/clipboard/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 74 matching lines @@
     RefPtr<NativeImageSkia> bitmap = image->nativeImageForCurrentFrame();
     if (!bitmap)
         return;
 
     blink::WebImage webImage = bitmap->bitmap();
     blink::Platform::current()->clipboard()->writeImage(webImage, blink::WebURL(url), blink::WebString(title));
 }
 
 void Pasteboard::writeDataObject(PassRefPtrWillBeRawPtr<DataObject> dataObject)
 {
-    blink::Platform::current()->clipboard()->writeDataObject(blink::WebDragData(dataObject));
+    blink::Platform::current()->clipboard()->writeDataObject(dataObject->toWebDragData());
 }
 
 bool Pasteboard::canSmartReplace()
 {
     return blink::Platform::current()->clipboard()->isFormatAvailable(blink::WebClipboard::FormatSmartPaste, m_buffer);
 }
 
 bool Pasteboard::isHTMLAvailable()
 {
     return blink::Platform::current()->clipboard()->isFormatAvailable(blink::WebClipboard::FormatHTML, m_buffer);
@@ skipping 24 matching lines @@
     String text = plainText;
 #if OS(WIN)
     replaceNewlinesWithWindowsStyleNewlines(text);
 #endif
     replaceNBSPWithSpace(text);
 
     blink::Platform::current()->clipboard()->writeHTML(markup, documentURL, text, canSmartCopyOrDelete);
 }
 
 } // namespace blink