Turn stack check elimination into proper HPhase.

src/hydrogen-sce.h

-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2013 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
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-#ifndef GAY_SHORTEST_H_
-#define GAY_SHORTEST_H_
+#ifndef V8_HYDROGEN_SCE_H_
+#define V8_HYDROGEN_SCE_H_
+
+#include "hydrogen.h"
 
 namespace v8 {
 namespace internal {
 
-struct PrecomputedShortest {
-  double v;
-  const char* representation;
-  int decimal_point;
+
+class HStackCheckEliminationPhase : public HPhase {
+ public:
+  explicit HStackCheckEliminationPhase(HGraph* graph)
+      : HPhase("H_Stack check elimination", graph) { }
+
+  void Run();
 };
 
-Vector<const PrecomputedShortest> PrecomputedShortestRepresentations();
 
 } }  // namespace v8::internal
 
-#endif  // GAY_SHORTEST_H_
+#endif  // V8_HYDROGEN_SCE_H_