Standardize usage of virtual/override/final specifiers.

content/browser/frame_host/render_widget_host_view_child_frame.h

Index: content/browser/frame_host/render_widget_host_view_child_frame.h
diff --git a/content/browser/frame_host/render_widget_host_view_child_frame.h b/content/browser/frame_host/render_widget_host_view_child_frame.h
index a10c78e8dcf9dee8f109789d744f1dc7af62dcd7..b2895f9f7df72fc5132157ac435c00bb07e9192f 100644
--- a/content/browser/frame_host/render_widget_host_view_child_frame.h
+++ b/content/browser/frame_host/render_widget_host_view_child_frame.h
@@ -100,9 +100,8 @@ class CONTENT_EXPORT RenderWidgetHostViewChildFrame
   gfx::Rect GetBoundsInRootWindow() override;
   gfx::GLSurfaceHandle GetCompositingSurface() override;
 #if defined(USE_AURA)
-  virtual void ProcessAckedTouchEvent(
-      const TouchEventWithLatencyInfo& touch,
-      InputEventAckState ack_result) override;
+  void ProcessAckedTouchEvent(const TouchEventWithLatencyInfo& touch,
+                              InputEventAckState ack_result) override;
 #endif  // defined(USE_AURA)
   bool LockMouse() override;
   void UnlockMouse() override;