Standardize usage of virtual/override/final in mojo/

mojo/services/native_viewport/main.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 "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "gpu/command_buffer/service/mailbox_manager.h"
 #include "mojo/application/application_runner_chromium.h"
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_connection.h"
@@ skipping 10 matching lines @@
 
 class NativeViewportAppDelegate
     : public ApplicationDelegate,
       public InterfaceFactory<NativeViewport>,
       public InterfaceFactory<Gpu> {
  public:
   NativeViewportAppDelegate()
       : share_group_(new gfx::GLShareGroup),
         mailbox_manager_(new gpu::gles2::MailboxManager),
         is_headless_(false) {}
-  virtual ~NativeViewportAppDelegate() {}
+  ~NativeViewportAppDelegate() override {}
 
  private:
   bool HasArg(const std::string& arg) {
     const auto& args = app_->args();
     return std::find(args.begin(), args.end(), arg) != args.end();
   }
 
   // ApplicationDelegate implementation.
-  virtual void Initialize(ApplicationImpl* application) override {
+  void Initialize(ApplicationImpl* application) override {
     app_ = application;
 
 #if !defined(COMPONENT_BUILD)
     if (HasArg(kUseTestConfig))
       gfx::GLSurface::InitializeOneOffForTests();
     else
       gfx::GLSurface::InitializeOneOff();
 #endif
     is_headless_ = HasArg(kUseHeadlessConfig);
   }
 
-  virtual bool ConfigureIncomingConnection(
+  bool ConfigureIncomingConnection(
       mojo::ApplicationConnection* connection) override {
     connection->AddService<NativeViewport>(this);
     connection->AddService<Gpu>(this);
     return true;
   }
 
   // InterfaceFactory<NativeViewport> implementation.
-  virtual void Create(ApplicationConnection* connection,
-                      InterfaceRequest<NativeViewport> request) override {
+  void Create(ApplicationConnection* connection,
+              InterfaceRequest<NativeViewport> request) override {
     BindToRequest(new NativeViewportImpl(app_, is_headless_), &request);
   }
 
   // InterfaceFactory<Gpu> implementation.
-  virtual void Create(ApplicationConnection* connection,
-                      InterfaceRequest<Gpu> request) override {
+  void Create(ApplicationConnection* connection,
+              InterfaceRequest<Gpu> request) override {
     BindToRequest(new GpuImpl(share_group_.get(), mailbox_manager_.get()),
                   &request);
   }
 
   ApplicationImpl* app_;
   scoped_refptr<gfx::GLShareGroup> share_group_;
   scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager_;
   bool is_headless_;
   DISALLOW_COPY_AND_ASSIGN(NativeViewportAppDelegate);
 };
 }
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunnerChromium runner(new mojo::NativeViewportAppDelegate);
   runner.set_message_loop_type(base::MessageLoop::TYPE_UI);
   return runner.Run(shell_handle);
 }