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

Source/modules/indexeddb/IDBTransaction.h

Index: Source/modules/indexeddb/IDBTransaction.h
diff --git a/Source/modules/indexeddb/IDBTransaction.h b/Source/modules/indexeddb/IDBTransaction.h
index 3c90681ac02322160f1136ffd3d040e15d847ee0..b5e7251675dd7c4e1f2edb185635e606f1de3b70 100644
--- a/Source/modules/indexeddb/IDBTransaction.h
+++ b/Source/modules/indexeddb/IDBTransaction.h
@@ -58,7 +58,7 @@ class MODULES_EXPORT IDBTransaction final
 public:
     static IDBTransaction* create(ScriptState*, int64_t, const HashSet<String>& objectStoreNames, WebIDBTransactionMode, IDBDatabase*);
     static IDBTransaction* create(ScriptState*, int64_t, IDBDatabase*, IDBOpenDBRequest*, const IDBDatabaseMetadata& previousMetadata);
-    virtual ~IDBTransaction();
+    ~IDBTransaction() override;
     DECLARE_VIRTUAL_TRACE();
 
     static WebIDBTransactionMode stringToMode(const String&);
@@ -96,15 +96,15 @@ public:
     void onComplete();
 
     // EventTarget
-    virtual const AtomicString& interfaceName() const override;
-    virtual ExecutionContext* executionContext() const override;
+    const AtomicString& interfaceName() const override;
+    ExecutionContext* executionContext() const override;
 
     using EventTarget::dispatchEvent;
-    virtual bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) override;
+    bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) override;
 
     // ActiveDOMObject
-    virtual bool hasPendingActivity() const override;
-    virtual void stop() override;
+    bool hasPendingActivity() const override;
+    void stop() override;
 
 private:
     IDBTransaction(ScriptState*, int64_t, const HashSet<String>&, WebIDBTransactionMode, IDBDatabase*, IDBOpenDBRequest*, const IDBDatabaseMetadata&);