Update implementation of atomics with latest Chromium version but use compiler builtin atomics

test/cctest/test-atomicops.cc

Index: test/cctest/test-atomicops.cc
diff --git a/test/cctest/test-atomicops.cc b/test/cctest/test-atomicops.cc
index 4a59ba68e364cd8d14d097ff2ec904dd46dc77f5..5ac4d5e47358863a0671312c998859ec1e3bf445 100644
--- a/test/cctest/test-atomicops.cc
+++ b/test/cctest/test-atomicops.cc
@@ -193,11 +193,6 @@ static void TestStore() {
   NoBarrier_Store(&value, kVal2);
   CHECK_EQU(kVal2, value);
 
-  Acquire_Store(&value, kVal1);
-  CHECK_EQU(kVal1, value);
-  Acquire_Store(&value, kVal2);
-  CHECK_EQU(kVal2, value);
-
   Release_Store(&value, kVal1);
   CHECK_EQU(kVal1, value);
   Release_Store(&value, kVal2);
@@ -238,11 +233,6 @@ static void TestLoad() {
   CHECK_EQU(kVal1, Acquire_Load(&value));
   value = kVal2;
   CHECK_EQU(kVal2, Acquire_Load(&value));
-
-  value = kVal1;
-  CHECK_EQU(kVal1, Release_Load(&value));
-  value = kVal2;
-  CHECK_EQU(kVal2, Release_Load(&value));
 }