Eliminatable CheckMaps replaced with if(true) or if(false).

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 9658e8341faab9202e61cf0b332aec9b9a16b32b..e0146c8b9d956d16883b877f414c107e6c46a578 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -114,6 +114,8 @@ class HBasicBlock V8_FINAL : public ZoneObject {
   bool Dominates(HBasicBlock* other) const;
   int LoopNestingDepth() const;
 
+  void ReplaceControlWithGotoSuccessor(int succ);
+
   void SetInitialEnvironment(HEnvironment* env);
   void ClearEnvironment() {
     ASSERT(IsFinished());
@@ -200,6 +202,7 @@ class HBasicBlock V8_FINAL : public ZoneObject {
                        int position);
 
  private:
+  void MarkSuccEdgeUnreachable(int succ);
   void RegisterPredecessor(HBasicBlock* pred);
   void AddDominatedBlock(HBasicBlock* block);