Standardize usage of virtual/override/final in extensions/

extensions/browser/api/hid/hid_device_manager.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 EXTENSIONS_BROWSER_API_HID_HID_DEVICE_MANAGER_H_
 #define EXTENSIONS_BROWSER_API_HID_HID_DEVICE_MANAGER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 10 matching lines @@
 class HidDeviceFilter;
 }
 
 namespace extensions {
 
 class Extension;
 
 class HidDeviceManager : public BrowserContextKeyedAPI {
  public:
   explicit HidDeviceManager(content::BrowserContext* context);
-  virtual ~HidDeviceManager();
+  ~HidDeviceManager() override;
 
   // BrowserContextKeyedAPI implementation.
   static BrowserContextKeyedAPIFactory<HidDeviceManager>* GetFactoryInstance();
 
   // Convenience method to get the HidDeviceManager for a profile.
   static HidDeviceManager* Get(content::BrowserContext* context) {
     return BrowserContextKeyedAPIFactory<HidDeviceManager>::Get(context);
   }
 
   scoped_ptr<base::ListValue> GetApiDevices(
@@ skipping 22 matching lines @@
 
   ResourceIdToDeviceIdMap device_ids_;
   DeviceIdToResourceIdMap resource_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(HidDeviceManager);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_HID_HID_DEVICE_MANAGER_H_