Improve our simple elimination of hole checks.

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
===================================================================
--- src/arm/lithium-arm.cc	(revision 9445)
+++ src/arm/lithium-arm.cc	(working copy)
@@ -1739,7 +1739,7 @@
 
 LInstruction* LChunkBuilder::DoLoadGlobalCell(HLoadGlobalCell* instr) {
   LLoadGlobalCell* result = new LLoadGlobalCell;
-  return instr->check_hole_value()
+  return instr->RequiresHoleCheck()
       ? AssignEnvironment(DefineAsRegister(result))
       : DefineAsRegister(result);
 }
@@ -1756,7 +1756,7 @@
   LOperand* temp = TempRegister();
   LOperand* value = UseTempRegister(instr->value());
   LInstruction* result = new LStoreGlobalCell(value, temp);
-  if (instr->check_hole_value()) result = AssignEnvironment(result);
+  if (instr->RequiresHoleCheck()) result = AssignEnvironment(result);
   return result;
 }