Add enables consistent with Chrome's WebKit

client/dom/generated/src/frog/WorkerContext.dart

 
 class WorkerContext native "*WorkerContext" {
 
   static final int PERSISTENT = 1;
 
   static final int TEMPORARY = 0;
 
   WorkerLocation location;
 
   WorkerNavigator navigator;
 
   WorkerContext self;
 
   NotificationCenter webkitNotifications;
 
   DOMURL webkitURL;
 
   void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   void clearInterval(int handle) native;
 
   void clearTimeout(int handle) native;
 
   void close() native;
 
   bool dispatchEvent(Event evt) native;
 
   void importScripts() native;
 
+  Database openDatabase(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback = null]) native;
+
+  DatabaseSync openDatabaseSync(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback = null]) native;
+
   void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   int setInterval(TimeoutHandler handler, int timeout) native;
 
   int setTimeout(TimeoutHandler handler, int timeout) native;
 
   void webkitRequestFileSystem(int type, int size, [FileSystemCallback successCallback = null, ErrorCallback errorCallback = null]) native;
 
   DOMFileSystemSync webkitRequestFileSystemSync(int type, int size) native;
 
   EntrySync webkitResolveLocalFileSystemSyncURL(String url) native;
 
   void webkitResolveLocalFileSystemURL(String url, [EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
 
   var dartObjectLocalStorage;
 
   String get typeName() native;
 }