Standardize usage of virtual/override/final specifiers.

ash/test/test_lock_state_controller_delegate.h

Index: ash/test/test_lock_state_controller_delegate.h
diff --git a/ash/test/test_lock_state_controller_delegate.h b/ash/test/test_lock_state_controller_delegate.h
index 39b04aa026b659885ec81047916c5483201cc197..1f633e7099e30b370d9520b14da2114f000ae5b6 100644
--- a/ash/test/test_lock_state_controller_delegate.h
+++ b/ash/test/test_lock_state_controller_delegate.h
@@ -15,14 +15,14 @@ namespace test {
 class TestLockStateControllerDelegate : public LockStateControllerDelegate {
  public:
   TestLockStateControllerDelegate();
-  virtual ~TestLockStateControllerDelegate();
+  ~TestLockStateControllerDelegate() override;
 
   int num_lock_requests() const { return num_lock_requests_; }
   int num_shutdown_requests() const { return num_shutdown_requests_; }
 
   // LockStateControllerDelegate implementation.
-  virtual void RequestLockScreen() override;
-  virtual void RequestShutdown() override;
+  void RequestLockScreen() override;
+  void RequestShutdown() override;
 
  private:
   int num_lock_requests_;