Move ToI conversions to the MacroAssembler

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index bef46df4ec53b5f6b78b0bccaf6781a64a05b1fc..4ae9c5f448ea71350f89fee212d5346fe0362d21 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -945,6 +945,11 @@ class HValue : public ZoneObject {
     return type().ToStringOrToNumberCanBeObserved(representation());
   }
 
+  MinusZeroMode GetMinusZeroMode() {
+    return CheckFlag(kBailoutOnMinusZero)
+        ? FAIL_ON_MINUS_ZERO : TREAT_MINUS_ZERO_AS_ZERO;
+  }
+
  protected:
   // This function must be overridden for instructions with flag kUseGVN, to
   // compare the non-Operand parts of the instruction.