Move atomic ops and related files to base library

src/sweeper-thread.cc

Index: src/sweeper-thread.cc
diff --git a/src/sweeper-thread.cc b/src/sweeper-thread.cc
index 9e28e8dbaf8c04612369520e1fe92a53c3478647..ea2553dfaa4b22189ee3a0f0d3fa59f0c75fc5e3 100644
--- a/src/sweeper-thread.cc
+++ b/src/sweeper-thread.cc
@@ -23,7 +23,7 @@ SweeperThread::SweeperThread(Isolate* isolate)
        end_sweeping_semaphore_(0),
        stop_semaphore_(0) {
   ASSERT(!FLAG_job_based_sweeping);
-  NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false));
+  base::NoBarrier_Store(&stop_thread_, static_cast<base::AtomicWord>(false));
 }
 
 
@@ -36,7 +36,7 @@ void SweeperThread::Run() {
   while (true) {
     start_sweeping_semaphore_.Wait();
 
-    if (Acquire_Load(&stop_thread_)) {
+    if (base::Acquire_Load(&stop_thread_)) {
       stop_semaphore_.Signal();
       return;
     }
@@ -49,7 +49,7 @@ void SweeperThread::Run() {
 
 
 void SweeperThread::Stop() {
-  Release_Store(&stop_thread_, static_cast<AtomicWord>(true));
+  base::Release_Store(&stop_thread_, static_cast<base::AtomicWord>(true));
   start_sweeping_semaphore_.Signal();
   stop_semaphore_.Wait();
   Join();