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

components/storage_monitor/image_capture_device_manager_unittest.mm

 // 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.
 
 #import <Foundation/Foundation.h>
 #import <ImageCaptureCore/ImageCaptureCore.h>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 222 matching lines @@
  private:
   std::vector<std::string> items_;
   std::vector<std::string> downloads_;
   bool completed_;
   bool removed_;
   base::File::Error last_error_;
 };
 
 class ImageCaptureDeviceManagerTest : public testing::Test {
  public:
-  virtual void SetUp() override {
-    monitor_ = TestStorageMonitor::CreateAndInstall();
-  }
+  void SetUp() override { monitor_ = TestStorageMonitor::CreateAndInstall(); }
 
-  virtual void TearDown() override {
-    TestStorageMonitor::Destroy();
-  }
+  void TearDown() override { TestStorageMonitor::Destroy(); }
 
   MockICCameraDevice* AttachDevice(ImageCaptureDeviceManager* manager) {
     // Ownership will be passed to the device browser delegate.
     base::scoped_nsobject<MockICCameraDevice> device(
         [[MockICCameraDevice alloc] init]);
     id<ICDeviceBrowserDelegate> delegate = manager->device_browser();
     [delegate deviceBrowser:nil didAddDevice:device moreComing:NO];
     return device.autorelease();
   }
 
@@ skipping 153 matching lines @@
   char file_contents[5];
   ASSERT_EQ(4, base::ReadFile(temp_file, file_contents,
                               strlen(kTestFileContents)));
   EXPECT_EQ(kTestFileContents,
             std::string(file_contents, strlen(kTestFileContents)));
 
   [camera didRemoveDevice:device];
 }
 
 }  // namespace storage_monitor