Standardize usage of virtual/override/final in mojo/

mojo/services/html_viewer/webthread_impl.cc

 // Copyright 2014 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.
 
 // An implementation of WebThread in terms of base::MessageLoop and
 // base::Thread
 
 #include "mojo/services/html_viewer/webthread_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "base/pending_task.h"
 #include "base/threading/platform_thread.h"
 
 namespace mojo {
 
 WebThreadBase::WebThreadBase() {}
 WebThreadBase::~WebThreadBase() {}
 
 class WebThreadBase::TaskObserverAdapter
     : public base::MessageLoop::TaskObserver {
  public:
   TaskObserverAdapter(WebThread::TaskObserver* observer)
       : observer_(observer) {}
 
-  virtual void WillProcessTask(const base::PendingTask& pending_task) override {
+  void WillProcessTask(const base::PendingTask& pending_task) override {
     observer_->willProcessTask();
   }
 
-  virtual void DidProcessTask(const base::PendingTask& pending_task) override {
+  void DidProcessTask(const base::PendingTask& pending_task) override {
     observer_->didProcessTask();
   }
 
 private:
   WebThread::TaskObserver* observer_;
 };
 
 void WebThreadBase::addTaskObserver(TaskObserver* observer) {
   CHECK(isCurrentThread());
   std::pair<TaskObserverMap::iterator, bool> result = task_observer_map_.insert(
@@ skipping 88 matching lines @@
   return message_loop_->BelongsToCurrentThread();
 }
 
 blink::PlatformThreadId WebThreadImplForMessageLoop::threadId() const {
   return thread_id_;
 }
 
 WebThreadImplForMessageLoop::~WebThreadImplForMessageLoop() {}
 
 }  // namespace mojo