Fix virtual/override/final usage in Source/core/html/.

Source/core/html/HTMLMetaElement.h

Index: Source/core/html/HTMLMetaElement.h
diff --git a/Source/core/html/HTMLMetaElement.h b/Source/core/html/HTMLMetaElement.h
index de496ec01e82a35e802b5e7555a13e4193b84940..8a5ca4e9ee44b48fda6a7498e82c73f0071af27b 100644
--- a/Source/core/html/HTMLMetaElement.h
+++ b/Source/core/html/HTMLMetaElement.h
@@ -54,9 +54,9 @@ private:
     static void processViewportKeyValuePair(Document*, const String& key, const String& value, bool viewportMetaZeroValuesQuirk, void* data);
     static void parseContentAttribute(const String& content, void* data, Document*, bool viewportMetaZeroValuesQuirk);
 
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
-    virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
-    virtual void didNotifySubtreeInsertionsToDocument() override;
+    void parseAttribute(const QualifiedName&, const AtomicString&) override;
+    InsertionNotificationRequest insertedInto(ContainerNode*) override;
+    void didNotifySubtreeInsertionsToDocument() override;
 
     static float parsePositiveNumber(Document*, const String& key, const String& value, bool* ok = 0);