Standardize usage of virtual/override/final specifiers.

ash/wm/gestures/long_press_affordance_handler.cc

Index: ash/wm/gestures/long_press_affordance_handler.cc
diff --git a/ash/wm/gestures/long_press_affordance_handler.cc b/ash/wm/gestures/long_press_affordance_handler.cc
index 49d3bd867df1494084532ae678190551b41fcd5a..aa8ce3890ab740549617ad5a524f96f2b5e4e439 100644
--- a/ash/wm/gestures/long_press_affordance_handler.cc
+++ b/ash/wm/gestures/long_press_affordance_handler.cc
@@ -161,8 +161,7 @@ class LongPressAffordanceHandler::LongPressAffordanceView
     widget_->GetNativeView()->layer()->SetOpacity(kAffordanceOpacityStartValue);
   }
 
-  virtual ~LongPressAffordanceView() {
-  }
+  ~LongPressAffordanceView() override {}
 
   void UpdateWithGrowAnimation(gfx::Animation* animation) {
     // Update the portion of the circle filled so far and re-draw.
@@ -187,12 +186,12 @@ class LongPressAffordanceHandler::LongPressAffordanceView
 
  private:
   // Overridden from views::View.
-  virtual gfx::Size GetPreferredSize() const override {
+  gfx::Size GetPreferredSize() const override {
     return gfx::Size(2 * (kAffordanceOuterRadius + kAffordanceGlowWidth),
         2 * (kAffordanceOuterRadius + kAffordanceGlowWidth));
   }
 
-  virtual void OnPaint(gfx::Canvas* canvas) override {
+  void OnPaint(gfx::Canvas* canvas) override {
     gfx::Point center(GetPreferredSize().width() / 2,
                       GetPreferredSize().height() / 2);
     canvas->Save();