Standardize usage of virtual/override/final specifiers.

ui/wm/core/compound_event_filter_unittest.cc

Index: ui/wm/core/compound_event_filter_unittest.cc
diff --git a/ui/wm/core/compound_event_filter_unittest.cc b/ui/wm/core/compound_event_filter_unittest.cc
index 05f75e93cac4820de967c037e094315c446ea294..453e03f3fc7e6d0b13ff3a576ab84b7aa702e8c3 100644
--- a/ui/wm/core/compound_event_filter_unittest.cc
+++ b/ui/wm/core/compound_event_filter_unittest.cc
@@ -35,13 +35,11 @@ namespace {
 class ConsumeGestureEventFilter : public ui::EventHandler {
  public:
   ConsumeGestureEventFilter() {}
-  virtual ~ConsumeGestureEventFilter() {}
+  ~ConsumeGestureEventFilter() override {}
 
  private:
   // Overridden from ui::EventHandler:
-  virtual void OnGestureEvent(ui::GestureEvent* e) override {
-    e->StopPropagation();
-  }
+  void OnGestureEvent(ui::GestureEvent* e) override { e->StopPropagation(); }
 
   DISALLOW_COPY_AND_ASSIGN(ConsumeGestureEventFilter);
 };