Fix HSourcePosition when --hydrogen-track-positions is used.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/403373002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22504 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/hydrogen-instructions.h

@@ -451,7 +451,7 @@ class HSourcePosition {
   typedef BitField<int, 0, 9> InliningIdField;
 
   // Offset from the start of the inlined function.
-  typedef BitField<int, 9, 22> PositionField;
+  typedef BitField<int, 9, 23> PositionField;
 
   // On HPositionInfo can use this constructor.
   explicit HSourcePosition(int value) : value_(value) { }