Update {virtual,override,final} to follow C++11 style.

media/midi/usb_midi_device_factory_android.h

 // 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.
 
 #ifndef MEDIA_MIDI_USB_MIDI_DEVICE_FACTORY_ANDROID_H_
 #define MEDIA_MIDI_USB_MIDI_DEVICE_FACTORY_ANDROID_H_
 
 #include <jni.h>
 #include <vector>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "media/base/media_export.h"
 #include "media/midi/usb_midi_device.h"
 
 namespace media {
 
 // This class enumerates UsbMidiDevices.
 class MEDIA_EXPORT UsbMidiDeviceFactoryAndroid : public UsbMidiDevice::Factory {
  public:
   UsbMidiDeviceFactoryAndroid();
-  virtual ~UsbMidiDeviceFactoryAndroid();
+  ~UsbMidiDeviceFactoryAndroid() override;
 
   // UsbMidiDevice::Factory implementation.
-  virtual void EnumerateDevices(UsbMidiDeviceDelegate* delegate,
-                                Callback callback) override;
+  void EnumerateDevices(UsbMidiDeviceDelegate* delegate,
+                        Callback callback) override;
 
   void OnUsbMidiDeviceRequestDone(JNIEnv* env,
                                   jobject caller,
                                   jobjectArray devices);
 
   static bool RegisterUsbMidiDeviceFactory(JNIEnv* env);
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> raw_factory_;
   // Not owned.
   UsbMidiDeviceDelegate* delegate_;
   Callback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(UsbMidiDeviceFactoryAndroid);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MIDI_USB_MIDI_DEVICE_FACTORY_ANDROID_H_