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

Source/modules/indexeddb/IDBObjectStore.cpp

Index: Source/modules/indexeddb/IDBObjectStore.cpp
diff --git a/Source/modules/indexeddb/IDBObjectStore.cpp b/Source/modules/indexeddb/IDBObjectStore.cpp
index 1cc956766971cbc8a30b29f6be441ce048b923a6..67d5f0b3ad0a88020ba65054dfddb716b16606a9 100644
--- a/Source/modules/indexeddb/IDBObjectStore.cpp
+++ b/Source/modules/indexeddb/IDBObjectStore.cpp
@@ -424,7 +424,7 @@ public:
         return adoptRef(new IndexPopulator(scriptState, database, transactionId, objectStoreId, indexMetadata));
     }
 
-    virtual bool operator==(const EventListener& other) override
+    bool operator==(const EventListener& other) override
     {
         return this == &other;
     }
@@ -440,7 +440,7 @@ private:
     {
     }
 
-    virtual void handleEvent(ExecutionContext* executionContext, Event* event) override
+    void handleEvent(ExecutionContext* executionContext, Event* event) override
     {
         ASSERT(m_scriptState->executionContext() == executionContext);
         ASSERT(event->type() == EventTypeNames::success);