Update web classes to use OVERRIDE / FINAL when needed

Source/web/IDBFactoryBackendProxy.h

Index: Source/web/IDBFactoryBackendProxy.h
diff --git a/Source/web/IDBFactoryBackendProxy.h b/Source/web/IDBFactoryBackendProxy.h
index b6ab372d4ee871e2998ed83e31433362e36ce9f6..23716fb2ba8e0432ecc074a7b593ff6bc36d7d2a 100644
--- a/Source/web/IDBFactoryBackendProxy.h
+++ b/Source/web/IDBFactoryBackendProxy.h
@@ -38,12 +38,12 @@ class ExecutionContext;
 namespace blink {
 
 // FIXME: This is just a permission client at this point. Rename/refactor.
-class IDBFactoryBackendProxy : public WebCore::IDBFactoryBackendInterface {
+class IDBFactoryBackendProxy FINAL : public WebCore::IDBFactoryBackendInterface {
 public:
     static PassRefPtr<WebCore::IDBFactoryBackendInterface> create();
     virtual ~IDBFactoryBackendProxy() { }
 
-    virtual bool allowIndexedDB(WebCore::ExecutionContext*, const String& name);
+    virtual bool allowIndexedDB(WebCore::ExecutionContext*, const String& name) OVERRIDE;
 
 private:
     IDBFactoryBackendProxy() { }