Fix virtual/override/final usage in Source/modules/.

Source/modules/battery/BatteryManager.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 BatteryManager_h
 #define BatteryManager_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseProperty.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/frame/PlatformEventController.h"
 #include "modules/EventTargetModules.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class BatteryStatus;
 
 class BatteryManager final : public RefCountedGarbageCollectedEventTargetWithInlineData<BatteryManager>, public ActiveDOMObject, public PlatformEventController {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(BatteryManager);
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(BatteryManager);
 public:
     static BatteryManager* create(ExecutionContext*);
-    virtual ~BatteryManager();
+    ~BatteryManager() override;
 
     // Returns a promise object that will be resolved with this BatteryManager.
     ScriptPromise startRequest(ScriptState*);
 
     // EventTarget implementation.
-    virtual const WTF::AtomicString& interfaceName() const override { return EventTargetNames::BatteryManager; }
-    virtual ExecutionContext* executionContext() const override { return ContextLifecycleObserver::executionContext(); }
+    const WTF::AtomicString& interfaceName() const override { return EventTargetNames::BatteryManager; }
+    ExecutionContext* executionContext() const override { return ContextLifecycleObserver::executionContext(); }
 
     bool charging();
     double chargingTime();
     double dischargingTime();
     double level();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(chargingchange);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(chargingtimechange);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(dischargingtimechange);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(levelchange);
 
     // Inherited from PlatformEventController.
-    virtual void didUpdateData() override;
-    virtual void registerWithDispatcher() override;
-    virtual void unregisterWithDispatcher() override;
-    virtual bool hasLastData() override;
+    void didUpdateData() override;
+    void registerWithDispatcher() override;
+    void unregisterWithDispatcher() override;
+    bool hasLastData() override;
 
     // ActiveDOMObject implementation.
-    virtual void suspend() override;
-    virtual void resume() override;
-    virtual void stop() override;
-    virtual bool hasPendingActivity() const override;
+    void suspend() override;
+    void resume() override;
+    void stop() override;
+    bool hasPendingActivity() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit BatteryManager(ExecutionContext*);
 
     using BatteryProperty = ScriptPromiseProperty<Member<BatteryManager>, Member<BatteryManager>, Member<DOMException>>;
     Member<BatteryProperty> m_batteryProperty;
     Member<BatteryStatus> m_batteryStatus;
 };
 
 } // namespace blink
 
 #endif // BatteryManager_h