Fix ARM build

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 38884ce0afc66cd4bf86e1926ac42f0111258389..dda19bd127f6901980c47b775b100eca5d9f4d44 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -2205,7 +2205,7 @@ LInstruction* LChunkBuilder::DoTransitionElementsKind(
     LOperand* new_map_reg = TempRegister();
     LTransitionElementsKind* result =
         new(zone()) LTransitionElementsKind(object, new_map_reg, NULL);
-    return DefineSameAsFirst(result);
+    return result;
   } else if (FLAG_compiled_transitions) {
     LTransitionElementsKind* result =
         new(zone()) LTransitionElementsKind(object, NULL, NULL);