Standardize usage of virtual/override/final in content/

content/child/child_message_filter.cc

 // Copyright 2013 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 "content/child/child_message_filter.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/location.h"
 #include "base/task_runner.h"
 #include "content/child/child_thread.h"
 #include "content/child/thread_safe_sender.h"
 #include "ipc/message_filter.h"
 
 namespace content {
 
 class ChildMessageFilter::Internal : public IPC::MessageFilter {
  public:
   explicit Internal(ChildMessageFilter* filter) : filter_(filter) {}
 
-  virtual bool OnMessageReceived(const IPC::Message& msg) override {
+  bool OnMessageReceived(const IPC::Message& msg) override {
     scoped_refptr<base::TaskRunner> runner =
         filter_->OverrideTaskRunnerForMessage(msg);
     if (runner.get() && !runner->RunsTasksOnCurrentThread()) {
       if (!runner->PostTask(
               FROM_HERE,
               base::Bind(
                   base::IgnoreResult(&ChildMessageFilter::OnMessageReceived),
                   filter_, msg)))
         filter_->OnStaleMessageReceived(msg);
       return true;
     }
 
     return filter_->OnMessageReceived(msg);
   }
 
  private:
-  virtual ~Internal() {}
+  ~Internal() override {}
   scoped_refptr<ChildMessageFilter> filter_;
 
   DISALLOW_COPY_AND_ASSIGN(Internal);
 };
 
 bool ChildMessageFilter::Send(IPC::Message* message) {
   return thread_safe_sender_->Send(message);
 }
 
 base::TaskRunner* ChildMessageFilter::OverrideTaskRunnerForMessage(
     const IPC::Message& msg) {
   return NULL;
 }
 
 ChildMessageFilter::ChildMessageFilter()
     : internal_(NULL),
       thread_safe_sender_(ChildThread::current()->thread_safe_sender()) {}
 
 ChildMessageFilter::~ChildMessageFilter() {}
 
 IPC::MessageFilter* ChildMessageFilter::GetFilter() {
   if (!internal_)
     internal_ = new Internal(this);
   return internal_;
 }
 
 }  // namespace content