Oilpan: move Range object to the oilpan heap.

Source/core/editing/VisiblePosition.h

 /*
  * Copyright (C) 2004, 2008 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 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef VisiblePosition_h
 #define VisiblePosition_h
 
 #include "core/dom/Position.h"
 #include "core/editing/EditingBoundary.h"
+#include "platform/heap/Handle.h"
 #include "platform/text/TextDirection.h"
 
 namespace WebCore {
 
 // VisiblePosition default affinity is downstream because
 // the callers do not really care (they just want the
 // deep position without regard to line position), and this
 // is cheaper than UPSTREAM
 #define VP_DEFAULT_AFFINITY DOWNSTREAM
 
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 inline bool operator==(const VisiblePosition& a, const VisiblePosition& b)
 {
     return a.deepEquivalent() == b.deepEquivalent();
 }
 
 inline bool operator!=(const VisiblePosition& a, const VisiblePosition& b)
 {
     return !(a == b);
 }
 
-PassRefPtr<Range> makeRange(const VisiblePosition&, const VisiblePosition&);
+PassRefPtrWillBeRawPtr<Range> makeRange(const VisiblePosition&, const VisiblePosition&);
 bool setStart(Range*, const VisiblePosition&);
 bool setEnd(Range*, const VisiblePosition&);
 VisiblePosition startVisiblePosition(const Range*, EAffinity);
 
 Element* enclosingBlockFlowElement(const VisiblePosition&);
 
 bool isFirstVisiblePositionInNode(const VisiblePosition&, const Node*);
 bool isLastVisiblePositionInNode(const VisiblePosition&, const Node*);
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const WebCore::VisiblePosition*);
 void showTree(const WebCore::VisiblePosition&);
 #endif
 
 #endif // VisiblePosition_h