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

content/browser/renderer_host/render_widget_resize_helper.cc

Index: content/browser/renderer_host/render_widget_resize_helper.cc
diff --git a/content/browser/renderer_host/render_widget_resize_helper.cc b/content/browser/renderer_host/render_widget_resize_helper.cc
index 212fcf15a0965fc967b58afbd78acbd5fc73961f..3cc329d71eed8be8e64fbe77b7199ac3d02e829e 100644
--- a/content/browser/renderer_host/render_widget_resize_helper.cc
+++ b/content/browser/renderer_host/render_widget_resize_helper.cc
@@ -72,21 +72,20 @@ class PumpableTaskRunner
   void RemoveWrappedTaskFromQueue(WrappedTask* task);
 
   // base::SingleThreadTaskRunner implementation:
-  virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
-                               const base::Closure& task,
-                               base::TimeDelta delay) override;
+  bool PostDelayedTask(const tracked_objects::Location& from_here,
+                       const base::Closure& task,
+                       base::TimeDelta delay) override;
 
-  virtual bool PostNonNestableDelayedTask(
-      const tracked_objects::Location& from_here,
-      const base::Closure& task,
-      base::TimeDelta delay) override;
+  bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
+                                  const base::Closure& task,
+                                  base::TimeDelta delay) override;
 
-  virtual bool RunsTasksOnCurrentThread() const override;
+  bool RunsTasksOnCurrentThread() const override;
 
  private:
   friend class WrappedTask;
 
-  virtual ~PumpableTaskRunner();
+  ~PumpableTaskRunner() override;
 
   // A queue of live messages.  Must hold |task_queue_lock_| to access. Tasks
   // are added only on the IO thread and removed only on the UI thread.  The