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

base/task_runner.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/task_runner.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/threading/post_task_and_reply_impl.h"
 
 namespace base {
 
 namespace {
 
 // TODO(akalin): There's only one other implementation of
 // PostTaskAndReplyImpl in WorkerPool.  Investigate whether it'll be
 // possible to merge the two.
 class PostTaskAndReplyTaskRunner : public internal::PostTaskAndReplyImpl {
  public:
   explicit PostTaskAndReplyTaskRunner(TaskRunner* destination);
 
  private:
-  virtual bool PostTask(const tracked_objects::Location& from_here,
-                        const Closure& task) OVERRIDE;
+  bool PostTask(const tracked_objects::Location& from_here,
+                const Closure& task) override;
 
   // Non-owning.
   TaskRunner* destination_;
 };
 
 PostTaskAndReplyTaskRunner::PostTaskAndReplyTaskRunner(
     TaskRunner* destination) : destination_(destination) {
   DCHECK(destination_);
 }
 
@@ skipping 24 matching lines @@
 
 void TaskRunner::OnDestruct() const {
   delete this;
 }
 
 void TaskRunnerTraits::Destruct(const TaskRunner* task_runner) {
   task_runner->OnDestruct();
 }
 
 }  // namespace base