Standardize usage of virtual/override/final in mojo/

mojo/shell/app_child_process.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.
 
 #include "mojo/shell/app_child_process.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
@@ skipping 139 matching lines @@
   base::Thread controller_thread_;
   scoped_refptr<base::SingleThreadTaskRunner> controller_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(AppContext);
 };
 
 // AppChildControllerImpl ------------------------------------------------------
 
 class AppChildControllerImpl : public InterfaceImpl<AppChildController> {
  public:
-  virtual ~AppChildControllerImpl() {
+  ~AppChildControllerImpl() override {
     DCHECK(thread_checker_.CalledOnValidThread());
 
     // TODO(vtl): Pass in the result from |MainMain()|.
     client()->AppCompleted(MOJO_RESULT_UNIMPLEMENTED);
   }
 
   // To be executed on the controller thread. Creates the |AppChildController|,
   // etc.
   static void Init(
       AppContext* app_context,
@@ skipping 12 matching lines @@
         app_context->io_runner(),
         base::Bind(&AppChildControllerImpl::DidCreateChannel,
                    base::Unretained(impl.get())),
         base::MessageLoopProxy::current()));
 
     BindToPipe(impl.get(), host_message_pipe.Pass());
 
     app_context->set_controller(impl.Pass());
   }
 
-  virtual void OnConnectionError() override {
+  void OnConnectionError() override {
     // TODO(darin): How should we handle a connection error here?
   }
 
   // |AppChildController| methods:
-  virtual void StartApp(const String& app_path,
-                        ScopedMessagePipeHandle service) override {
+  void StartApp(const String& app_path,
+                ScopedMessagePipeHandle service) override {
     DVLOG(2) << "AppChildControllerImpl::StartApp(" << app_path << ", ...)";
     DCHECK(thread_checker_.CalledOnValidThread());
 
     unblocker_.Unblock(base::Bind(&AppChildControllerImpl::StartAppOnMainThread,
                                   base::FilePath::FromUTF8Unsafe(app_path),
                                   base::Passed(&service)));
   }
 
  private:
   AppChildControllerImpl(AppContext* app_context,
@@ skipping 73 matching lines @@
       base::Bind(&AppChildControllerImpl::Init, base::Unretained(&app_context),
                  base::Passed(platform_channel()), blocker.GetUnblocker()));
   // This will block, then run whatever the controller wants.
   blocker.Block();
 
   app_context.Shutdown();
 }
 
 }  // namespace shell
 }  // namespace mojo