Update web classes to use OVERRIDE / FINAL when needed

Source/web/StorageNamespaceProxy.h

Index: Source/web/StorageNamespaceProxy.h
diff --git a/Source/web/StorageNamespaceProxy.h b/Source/web/StorageNamespaceProxy.h
index f69ed155d0d6840ea8b8ee84f3bd493ba0c6dc33..8f1170a60178f0e36f4b17c69fbf25ca3efe0d4b 100644
--- a/Source/web/StorageNamespaceProxy.h
+++ b/Source/web/StorageNamespaceProxy.h
@@ -35,11 +35,11 @@ namespace WebCore {
 
 // Instances of StorageNamespaceProxy are only used to interact with
 // SessionStorage, never LocalStorage.
-class StorageNamespaceProxy : public StorageNamespace {
+class StorageNamespaceProxy FINAL : public StorageNamespace {
 public:
     explicit StorageNamespaceProxy(PassOwnPtr<blink::WebStorageNamespace>);
     virtual ~StorageNamespaceProxy();
-    virtual PassOwnPtr<StorageArea> storageArea(SecurityOrigin*);
+    virtual PassOwnPtr<StorageArea> storageArea(SecurityOrigin*) OVERRIDE;
 
     bool isSameNamespace(const blink::WebStorageNamespace&);