Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/page/DragState.h

 /*
  * Copyright (C) 2011 Google Inc.
  *
  * 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 24 matching lines @@
 
 class DataTransfer;
 class Node;
 
 // TODO(Oilpan): when Node is always on the heap, just derive from GarbageCollected<>.
 class DragState final : public GarbageCollectedFinalized<DragState> {
     WTF_MAKE_NONCOPYABLE(DragState);
 public:
     DragState() { }
 
-    RefPtrWillBeMember<Node> m_dragSrc; // element that may be a drag source, for the current mouse gesture
+    Member<Node> m_dragSrc; // element that may be a drag source, for the current mouse gesture
     DragSourceAction m_dragType;
     Member<DataTransfer> m_dragDataTransfer; // used on only the source side of dragging
 
     DEFINE_INLINE_TRACE()
     {
         visitor->trace(m_dragSrc);
         visitor->trace(m_dragDataTransfer);
     }
 };
 
 } // namespace blink
 
 #endif // DragState_h