Remove dangerous default parameter from machine Store operator.

test/cctest/compiler/test-changes-lowering.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <limits>
 
 #include "src/compiler/control-builders.h"
 #include "src/compiler/generic-node-inl.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/compiler/pipeline.h"
@@ skipping 195 matching lines @@
     }
   }
 }
 
 
 TEST(RunChangeTaggedToFloat64) {
   ChangesLoweringTester<int32_t> t(kMachineTagged);
   double result;
 
   t.BuildStoreAndLower(t.simplified()->ChangeTaggedToFloat64(),
-                       t.machine()->Store(kMachineFloat64), &result);
+                       t.machine()->Store(kMachineFloat64, kNoWriteBarrier),
+                       &result);
 
   if (Pipeline::SupportedTarget()) {
     FOR_INT32_INPUTS(i) {
       int32_t input = *i;
 
       if (Smi::IsValid(input)) {
         t.Call(Smi::FromInt(input));
         CHECK_EQ(input, static_cast<int32_t>(result));
       }
 
@@ skipping 160 matching lines @@
 
   if (TODO_FLOAT64_TO_TAGGED && Pipeline::SupportedTarget()) {
     FOR_FLOAT64_INPUTS(i) {
       input = *i;
       SimulateFullSpace(CcTest::heap()->new_space());
       Object* result = t.CallWithPotentialGC<Object>();
       t.CheckNumber(input, result);
     }
   }
 }