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

Source/modules/indexeddb/IDBDatabase.h

Index: Source/modules/indexeddb/IDBDatabase.h
diff --git a/Source/modules/indexeddb/IDBDatabase.h b/Source/modules/indexeddb/IDBDatabase.h
index 006c1c22385d5d518f73bcbc68e8668f7508277b..31f5d2de4618ef5e556273734bddc0f6b27c8625 100644
--- a/Source/modules/indexeddb/IDBDatabase.h
+++ b/Source/modules/indexeddb/IDBDatabase.h
@@ -60,7 +60,7 @@ class MODULES_EXPORT IDBDatabase final
     DEFINE_WRAPPERTYPEINFO();
 public:
     static IDBDatabase* create(ExecutionContext*, PassOwnPtr<WebIDBDatabase>, IDBDatabaseCallbacks*);
-    virtual ~IDBDatabase();
+    ~IDBDatabase() override;
     DECLARE_VIRTUAL_TRACE();
 
     void setMetadata(const IDBDatabaseMetadata& metadata) { m_metadata = metadata; }
@@ -90,12 +90,12 @@ public:
     void onComplete(int64_t);
 
     // ActiveDOMObject
-    virtual bool hasPendingActivity() const override;
-    virtual void stop() override;
+    bool hasPendingActivity() const override;
+    void stop() override;
 
     // EventTarget
-    virtual const AtomicString& interfaceName() const override;
-    virtual ExecutionContext* executionContext() const override;
+    const AtomicString& interfaceName() const override;
+    ExecutionContext* executionContext() const override;
 
     bool isClosePending() const { return m_closePending; }
     void forceClose();
@@ -103,7 +103,7 @@ public:
     void enqueueEvent(PassRefPtrWillBeRawPtr<Event>);
 
     using EventTarget::dispatchEvent;
-    virtual bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) override;
+    bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) override;
 
     int64_t findObjectStoreId(const String& name) const;
     bool containsObjectStore(const String& name) const