[part 2] Make classes and structures in modules fast-allocated.

Source/modules/webdatabase/DOMWindowWebDatabase.h

Index: Source/modules/webdatabase/DOMWindowWebDatabase.h
diff --git a/Source/modules/webdatabase/DOMWindowWebDatabase.h b/Source/modules/webdatabase/DOMWindowWebDatabase.h
index b2a43eb9034c1d887d48d2d90a2352905625de63..de3de42c7c90fc936606e0852ae29b557406c01e 100644
--- a/Source/modules/webdatabase/DOMWindowWebDatabase.h
+++ b/Source/modules/webdatabase/DOMWindowWebDatabase.h
@@ -38,12 +38,9 @@ class DatabaseCallback;
 class ExceptionState;
 
 class DOMWindowWebDatabase {
+    STATIC_ONLY(DOMWindowWebDatabase);
 public:
     static Database* openDatabase(DOMWindow&, const String& name, const String& version, const String& displayName, unsigned long estimatedSize, DatabaseCallback* creationCallback, ExceptionState&);
-
-private:
-    DOMWindowWebDatabase() { }
-    ~DOMWindowWebDatabase() { }
 };
 
 } // namespace blink