Rename "NoBarrier" memory operations to "Relaxed".

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index 2a01e3e55e38e3de4d1cc4c0f70c868992d0674b..f33e06061972154bbe6be6df39971274338c47e3 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -2434,7 +2434,7 @@ std::unique_ptr<SerializationData> Worker::GetMessage() {
   while (!out_queue_.Dequeue(&result)) {
     // If the worker is no longer running, and there are no messages in the
     // queue, don't expect any more messages from it.
-    if (!base::NoBarrier_Load(&running_)) break;
+    if (!base::Relaxed_Load(&running_)) break;
     out_semaphore_.Wait();
   }
   return result;
@@ -2442,7 +2442,7 @@ std::unique_ptr<SerializationData> Worker::GetMessage() {
 
 
 void Worker::Terminate() {
-  base::NoBarrier_Store(&running_, false);
+  base::Relaxed_Store(&running_, false);
   // Post NULL to wake the Worker thread message loop, and tell it to stop
   // running.
   PostMessage(NULL);