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

Source/modules/device_light/DeviceLightDispatcher.h

Index: Source/modules/device_light/DeviceLightDispatcher.h
diff --git a/Source/modules/device_light/DeviceLightDispatcher.h b/Source/modules/device_light/DeviceLightDispatcher.h
index 61b73e60f43951cc6243df4e573a9ab135c69f65..58315bc0e5a0101b595cfd674078f190e8cdd40f 100644
--- a/Source/modules/device_light/DeviceLightDispatcher.h
+++ b/Source/modules/device_light/DeviceLightDispatcher.h
@@ -16,12 +16,12 @@ class DeviceLightDispatcher final : public GarbageCollectedFinalized<DeviceLight
     USING_GARBAGE_COLLECTED_MIXIN(DeviceLightDispatcher);
 public:
     static DeviceLightDispatcher& instance();
-    virtual ~DeviceLightDispatcher();
+    ~DeviceLightDispatcher() override;
 
     double latestDeviceLightData() const;
 
     // Inherited from WebDeviceLightListener.
-    virtual void didChangeDeviceLight(double) override;
+    void didChangeDeviceLight(double) override;
 
     DECLARE_VIRTUAL_TRACE();
 
@@ -29,8 +29,8 @@ private:
     DeviceLightDispatcher();
 
     // Inherited from PlatformEventDispatcher.
-    virtual void startListening() override;
-    virtual void stopListening() override;
+    void startListening() override;
+    void stopListening() override;
 
     double m_lastDeviceLightData;
 };