Turn propagate deoptimizing mark into a proper HPhase.

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 7a76152d0e3ec62266c81f6b0d300456884b7787..511fe222e62d4dafb5d450b0e4e3a5617f778ff4 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -306,7 +306,6 @@ class HGraph: public ZoneObject {
   void SetupInformativeDefinitions();
   void DehoistSimpleArrayIndexComputations();
   void RestoreActualValues();
-  void PropagateDeoptimizingMark();
   void AnalyzeAndPruneEnvironmentLiveness();
 
   // Returns false if there are phi-uses of the arguments-object
@@ -450,8 +449,6 @@ class HGraph: public ZoneObject {
     phase.Run();
   }
 
-  void MarkAsDeoptimizingRecursively(HBasicBlock* block);
-  void NullifyUnreachableInstructions();
   void InsertTypeConversions(HInstruction* instr);
   void RecursivelyMarkPhiDeoptimizeOnUndefined(HPhi* phi);
   void CheckForBackEdge(HBasicBlock* block, HBasicBlock* successor);