Cleanup some of the range uses in ModI/DivI.

src/hydrogen-instructions.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 837 matching lines @@
   GVNFlagSet ObservableChangesFlags() const {
     GVNFlagSet result = ChangesFlags();
     result.Intersect(AllObservableSideEffectsFlagSet());
     return result;
   }
 
   Range* range() const { return range_; }
   // TODO(svenpanne) We should really use the null object pattern here.
   bool HasRange() const { return range_ != NULL; }
   bool CanBeNegative() const { return !HasRange() || range()->CanBeNegative(); }
-  bool CanBeZero() const { return !HasRange() || range()->CanBeZero(); }
   bool RangeCanInclude(int value) const {
     return !HasRange() || range()->Includes(value);
   }
   void AddNewRange(Range* r, Zone* zone);
   void RemoveLastAddedRange();
   void ComputeInitialRange(Zone* zone);
 
   // Escape analysis helpers.
   virtual bool HasEscapingOperandAt(int index) { return true; }
   virtual bool HasOutOfBoundsAccess(int size) { return false; }
@@ skipping 6649 matching lines @@
   virtual bool IsDeletable() const V8_OVERRIDE { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_