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

Source/modules/indexeddb/WebIDBDatabaseCallbacksImpl.h

Index: Source/modules/indexeddb/WebIDBDatabaseCallbacksImpl.h
diff --git a/Source/modules/indexeddb/WebIDBDatabaseCallbacksImpl.h b/Source/modules/indexeddb/WebIDBDatabaseCallbacksImpl.h
index baecd4cc9ea9157c750b25cd6dae0b3f0cd41282..9e43b5373c596ba7d4f09a786a60fdbb185749ee 100644
--- a/Source/modules/indexeddb/WebIDBDatabaseCallbacksImpl.h
+++ b/Source/modules/indexeddb/WebIDBDatabaseCallbacksImpl.h
@@ -40,12 +40,12 @@ class WebIDBDatabaseCallbacksImpl final : public WebIDBDatabaseCallbacks {
 public:
     static PassOwnPtr<WebIDBDatabaseCallbacksImpl> create(IDBDatabaseCallbacks*);
 
-    virtual ~WebIDBDatabaseCallbacksImpl();
+    ~WebIDBDatabaseCallbacksImpl() override;
 
-    virtual void onForcedClose() override;
-    virtual void onVersionChange(long long oldVersion, long long newVersion) override;
-    virtual void onAbort(long long transactionId, const WebIDBDatabaseError&) override;
-    virtual void onComplete(long long transactionId) override;
+    void onForcedClose() override;
+    void onVersionChange(long long oldVersion, long long newVersion) override;
+    void onAbort(long long transactionId, const WebIDBDatabaseError&) override;
+    void onComplete(long long transactionId) override;
 
 private:
     explicit WebIDBDatabaseCallbacksImpl(IDBDatabaseCallbacks*);