Add acquire/release to global variable.

base/debug/activity_tracker.cc

Index: base/debug/activity_tracker.cc
diff --git a/base/debug/activity_tracker.cc b/base/debug/activity_tracker.cc
index efdf8c89ee6b3b241c532bf1a17e1e5132b0e9bc..09946eed7296a2088f152b30ab46b513ea6dcf05 100644
--- a/base/debug/activity_tracker.cc
+++ b/base/debug/activity_tracker.cc
@@ -1260,7 +1260,7 @@ GlobalActivityTracker::GlobalActivityTracker(
 
   // Ensure that there is no other global object and then make this one such.
   DCHECK(!g_tracker_);
-  subtle::NoBarrier_Store(&g_tracker_, reinterpret_cast<uintptr_t>(this));
+  subtle::Release_Store(&g_tracker_, reinterpret_cast<uintptr_t>(this));
 
   // The global records must be iterable in order to be found by an analyzer.
   allocator_->MakeIterable(allocator_->GetAsReference(
@@ -1276,7 +1276,7 @@ GlobalActivityTracker::GlobalActivityTracker(
 GlobalActivityTracker::~GlobalActivityTracker() {
   DCHECK_EQ(Get(), this);
   DCHECK_EQ(0, thread_tracker_count_.load(std::memory_order_relaxed));
-  subtle::NoBarrier_Store(&g_tracker_, 0);
+  subtle::Release_Store(&g_tracker_, 0);
 }
 
 void GlobalActivityTracker::ReturnTrackerMemory(