Replacing the OVERRIDE with override in /src/athena

athena/test/base/activity_lifetime_tracker.h

Index: athena/test/base/activity_lifetime_tracker.h
diff --git a/athena/test/base/activity_lifetime_tracker.h b/athena/test/base/activity_lifetime_tracker.h
index 8217b8b11b6c5755f1b4a227cc98d115f8e48cad..670385f0a061fb4be2d510eb637fb33221b0c4ee 100644
--- a/athena/test/base/activity_lifetime_tracker.h
+++ b/athena/test/base/activity_lifetime_tracker.h
@@ -18,10 +18,10 @@ class ActivityLifetimeTracker : public ActivityManagerObserver {
   virtual ~ActivityLifetimeTracker();
 
   // Called after an |activity| got created.
-  virtual void OnActivityStarted(Activity* activity) OVERRIDE;
+  virtual void OnActivityStarted(Activity* activity) override;
 
   // Called before an |activity| gets destroyed.
-  virtual void OnActivityEnding(Activity* activity) OVERRIDE;
+  virtual void OnActivityEnding(Activity* activity) override;
 
   // Returns the newly created activity (if any) and resets its reference.
   Activity* GetNewActivityAndReset();