core/platform: Include wtf files using "wtf/foo.h" form.

Source/core/platform/DragData.h

 /*
  * Copyright (C) 2007 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
 #ifndef DragData_h
 #define DragData_h
 
 #include "core/page/DragActions.h"
 #include "core/platform/chromium/DragDataRef.h"
 #include "core/platform/graphics/IntPoint.h"
 
-#include <wtf/Forward.h>
-#include <wtf/HashMap.h>
-#include <wtf/Vector.h>
+#include "wtf/Forward.h"
+#include "wtf/HashMap.h"
+#include "wtf/Vector.h"
 
 namespace WebCore {
 
 class Frame;
 class DocumentFragment;
 class KURL;
 class Range;
 
 enum DragApplicationFlags {
     DragApplicationNone = 0,
@@ skipping 34 matching lines @@
     IntPoint m_clientPosition;
     IntPoint m_globalPosition;
     DragDataRef m_platformDragData;
     DragOperation m_draggingSourceOperationMask;
     DragApplicationFlags m_applicationFlags;
 };
 
 }
 
 #endif // !DragData_h