Standardize usage of virtual/override/final in chrome/browser/devtools/

chrome/browser/devtools/device/usb/usb_device_provider.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 CHROME_BROWSER_DEVTOOLS_DEVICE_USB_USB_DEVICE_PROVIDER_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVICE_USB_USB_DEVICE_PROVIDER_H_
 
 #include "chrome/browser/devtools/device/android_device_manager.h"
 
 namespace crypto {
 class RSAPrivateKey;
 }
 
 class AndroidUsbDevice;
 
 class UsbDeviceProvider : public AndroidDeviceManager::DeviceProvider {
  public:
   static void CountDevices(const base::Callback<void(int)>& callback);
 
   explicit UsbDeviceProvider(Profile* profile);
 
-  virtual void QueryDevices(const SerialsCallback& callback) override;
+  void QueryDevices(const SerialsCallback& callback) override;
 
-  virtual void QueryDeviceInfo(const std::string& serial,
-                               const DeviceInfoCallback& callback) override;
+  void QueryDeviceInfo(const std::string& serial,
+                       const DeviceInfoCallback& callback) override;
 
-  virtual void OpenSocket(const std::string& serial,
-                          const std::string& socket_name,
-                          const SocketCallback& callback) override;
+  void OpenSocket(const std::string& serial,
+                  const std::string& socket_name,
+                  const SocketCallback& callback) override;
 
-  virtual void ReleaseDevice(const std::string& serial) override;
+  void ReleaseDevice(const std::string& serial) override;
 
  private:
-  virtual ~UsbDeviceProvider();
+  ~UsbDeviceProvider() override;
 
   void EnumeratedDevices(
       const SerialsCallback& callback,
       const std::vector<scoped_refptr<AndroidUsbDevice> >& devices);
 
   typedef std::map<std::string, scoped_refptr<AndroidUsbDevice> > UsbDeviceMap;
 
   scoped_ptr<crypto::RSAPrivateKey>  rsa_key_;
   UsbDeviceMap device_map_;
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVICE_USB_USB_DEVICE_PROVIDER_H_