Refactor transitioning stores.

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index b333095c7933cffc6292ef63b24b2d2c1301e80c..d3f1efe2b973f8a5f931aae7b72c8e64e524a177 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -2145,17 +2145,15 @@ class LSmiUntag V8_FINAL : public LTemplateInstruction<1, 1, 0> {
 };
 
 
-class LStoreNamedField V8_FINAL : public LTemplateInstruction<0, 2, 1> {
+class LStoreNamedField V8_FINAL : public LTemplateInstruction<0, 2, 0> {
  public:
-  LStoreNamedField(LOperand* object, LOperand* value, LOperand* temp) {
+  LStoreNamedField(LOperand* object, LOperand* value) {
     inputs_[0] = object;
     inputs_[1] = value;
-    temps_[0] = temp;
   }
 
   LOperand* object() { return inputs_[0]; }
   LOperand* value() { return inputs_[1]; }
-  LOperand* temp() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedField, "store-named-field")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedField)