Standardize usage of virtual/override/final in content/browser/

content/browser/renderer_host/input/synthetic_pinch_gesture.h

Index: content/browser/renderer_host/input/synthetic_pinch_gesture.h
diff --git a/content/browser/renderer_host/input/synthetic_pinch_gesture.h b/content/browser/renderer_host/input/synthetic_pinch_gesture.h
index 60530c13338976ec231efd93082456f2d2877a9a..71e79ec6b2b82972b944ded99ba07773b4aecdfb 100644
--- a/content/browser/renderer_host/input/synthetic_pinch_gesture.h
+++ b/content/browser/renderer_host/input/synthetic_pinch_gesture.h
@@ -18,9 +18,9 @@ namespace content {
 class CONTENT_EXPORT SyntheticPinchGesture : public SyntheticGesture {
  public:
   explicit SyntheticPinchGesture(const SyntheticPinchGestureParams& params);
-  virtual ~SyntheticPinchGesture();
+  ~SyntheticPinchGesture() override;
 
-  virtual SyntheticGesture::Result ForwardInputEvents(
+  SyntheticGesture::Result ForwardInputEvents(
       const base::TimeTicks& timestamp,
       SyntheticGestureTarget* target) override;