replace 'virtual ... OVERRIDE' with '... override'

base/threading/sequenced_worker_pool.h

Index: base/threading/sequenced_worker_pool.h
diff --git a/base/threading/sequenced_worker_pool.h b/base/threading/sequenced_worker_pool.h
index d3c85e23ae4690217ab764867738a02d3e1ad1cc..b63e23e54f2f4239f7078191be16424980c893b8 100644
--- a/base/threading/sequenced_worker_pool.h
+++ b/base/threading/sequenced_worker_pool.h
@@ -290,10 +290,10 @@ class BASE_EXPORT SequencedWorkerPool : public TaskRunner {
       WorkerShutdown shutdown_behavior);
 
   // TaskRunner implementation. Forwards to PostDelayedWorkerTask().
-  virtual bool PostDelayedTask(const tracked_objects::Location& from_here,
-                               const Closure& task,
-                               TimeDelta delay) OVERRIDE;
-  virtual bool RunsTasksOnCurrentThread() const OVERRIDE;
+  bool PostDelayedTask(const tracked_objects::Location& from_here,
+                       const Closure& task,
+                       TimeDelta delay) override;
+  bool RunsTasksOnCurrentThread() const override;
 
   // Returns true if the current thread is processing a task with the given
   // sequence_token.
@@ -338,7 +338,7 @@ class BASE_EXPORT SequencedWorkerPool : public TaskRunner {
  protected:
   virtual ~SequencedWorkerPool();
 
-  virtual void OnDestruct() const OVERRIDE;
+  void OnDestruct() const override;
 
  private:
   friend class RefCountedThreadSafe<SequencedWorkerPool>;