Standardize usage of virtual/override/final specifiers.

components/storage_monitor/media_transfer_protocol_device_observer_linux_unittest.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.
 //
 // MediaTransferProtocolDeviceObserverLinux unit tests.
 
 #include "components/storage_monitor/media_transfer_protocol_device_observer_linux.h"
 
 #include <string>
 
@@ skipping 78 matching lines @@
 
 }  // namespace
 
 // A class to test the functionality of MediaTransferProtocolDeviceObserverLinux
 // member functions.
 class MediaTransferProtocolDeviceObserverLinuxTest : public testing::Test {
  public:
   MediaTransferProtocolDeviceObserverLinuxTest()
       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {}
 
-  virtual ~MediaTransferProtocolDeviceObserverLinuxTest() {}
+  ~MediaTransferProtocolDeviceObserverLinuxTest() override {}
 
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     mock_storage_observer_.reset(new MockRemovableStorageObserver);
     TestStorageMonitor* monitor = TestStorageMonitor::CreateAndInstall();
     mtp_device_observer_.reset(
         new TestMediaTransferProtocolDeviceObserverLinux(
             monitor->receiver(), monitor->media_transfer_protocol_manager()));
     monitor->AddObserver(mock_storage_observer_.get());
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     StorageMonitor* monitor = StorageMonitor::GetInstance();
     monitor->RemoveObserver(mock_storage_observer_.get());
     mtp_device_observer_.reset();
     TestStorageMonitor::Destroy();
   }
 
   // Returns the device changed observer object.
   MockRemovableStorageObserver& observer() {
     return *mock_storage_observer_;
   }
@@ skipping 43 matching lines @@
   mtp_device_observer()->MtpStorageAttached(kStorageWithInvalidInfo);
 
   // Detach the attached storage.
   mtp_device_observer()->MtpStorageDetached(kStorageWithInvalidInfo);
 
   EXPECT_EQ(0, observer().attach_calls());
   EXPECT_EQ(0, observer().detach_calls());
 }
 
 }  // namespace storage_monitor