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

components/storage_monitor/test_portable_device_watcher_win.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.
 //
 // This file contains a subclass of PortableDeviceWatcherWin to expose some
 // functionality for testing.
 
 #ifndef COMPONENTS_STORAGE_MONITOR_TEST_PORTABLE_DEVICE_WATCHER_WIN_H_
 #define COMPONENTS_STORAGE_MONITOR_TEST_PORTABLE_DEVICE_WATCHER_WIN_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
 #include "components/storage_monitor/portable_device_watcher_win.h"
 
 namespace storage_monitor {
 
 class TestPortableDeviceWatcherWin : public PortableDeviceWatcherWin {
  public:
   // MTP device PnP identifiers.
   static const base::char16 kMTPDeviceWithMultipleStorages[];
   static const base::char16 kMTPDeviceWithInvalidInfo[];
   static const base::char16 kMTPDeviceWithValidInfo[];
 
   // MTP device storage unique identifier.
   static const char kStorageUniqueIdA[];
 
   TestPortableDeviceWatcherWin();
-  virtual ~TestPortableDeviceWatcherWin();
+  ~TestPortableDeviceWatcherWin() override;
 
   // Returns the persistent storage unique id of the device specified by the
   // |pnp_device_id|. |storage_object_id| specifies the string ID that uniquely
   // identifies the object on the device.
   static std::string GetMTPStorageUniqueId(
       const base::string16& pnp_device_id,
       const base::string16& storage_object_id);
 
   // Returns a list of storage object identifiers of the media transfer protocol
   // (MTP) device given a |pnp_device_id|.
@@ skipping 13 matching lines @@
   static PortableDeviceWatcherWin::StorageObjects GetDeviceStorageObjects(
       const base::string16& pnp_device_id);
 
   // Used by MediaFileSystemRegistry unit test.
   void set_use_dummy_mtp_storage_info(bool use_dummy_info) {
     use_dummy_mtp_storage_info_ = use_dummy_info;
   }
 
  private:
   // PortableDeviceWatcherWin:
-  virtual void EnumerateAttachedDevices() override;
-  virtual void HandleDeviceAttachEvent(
-      const base::string16& pnp_device_id) override;
-  virtual bool GetMTPStorageInfoFromDeviceId(
+  void EnumerateAttachedDevices() override;
+  void HandleDeviceAttachEvent(const base::string16& pnp_device_id) override;
+  bool GetMTPStorageInfoFromDeviceId(
       const std::string& storage_device_id,
       base::string16* device_location,
       base::string16* storage_object_id) const override;
 
   // Set to true to get dummy storage details from
   // GetMTPStorageInfoFromDeviceId().
   bool use_dummy_mtp_storage_info_;
 
   DISALLOW_COPY_AND_ASSIGN(TestPortableDeviceWatcherWin);
 };
 
 }  // namespace storage_monitor
 
 #endif  // COMPONENTS_STORAGE_MONITOR_TEST_PORTABLE_DEVICE_WATCHER_WIN_H_