Implement cancel() API on a Notification object so that script can cancel or ...

chrome/browser/notifications/desktop_notification_service.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/notifications/desktop_notification_service.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/string_piece.h"
 #include "base/string_util.h"
@@ skipping 249 matching lines @@
     return;
   tab->AddInfoBar(new NotificationPermissionInfoBarDelegate(tab, origin,
                                                             callback_context));
 }
 
 void DesktopNotificationService::ShowNotification(
     const Notification& notification) {
   ui_manager_->Add(notification, profile_);
 }
 
+bool DesktopNotificationService::CancelDesktopNotification(
+    int process_id, int route_id, int notification_id) {
+  scoped_refptr<NotificationObjectProxy> proxy(
+      new NotificationObjectProxy(process_id, route_id, notification_id,
+                                  false));
+  Notification notif(GURL(), GURL(), proxy);
+  return ui_manager_->Cancel(notif);
+}
+
+
 bool DesktopNotificationService::ShowDesktopNotification(
     const GURL& origin, const GURL& url, int process_id, int route_id,
     NotificationSource source, int notification_id) {
   DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
   NotificationObjectProxy* proxy =
       new NotificationObjectProxy(process_id, route_id,
                                   notification_id,
                                   source == WorkerNotification);
   Notification notif(origin, url, proxy);
   ShowNotification(notif);
   return true;
 }
 
 bool DesktopNotificationService::ShowDesktopNotificationText(
     const GURL& origin, const GURL& icon, const string16& title,
     const string16& text, int process_id, int route_id,
     NotificationSource source, int notification_id) {
   DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
   NotificationObjectProxy* proxy =
       new NotificationObjectProxy(process_id, route_id,
                                   notification_id,
                                   source == WorkerNotification);
   // "upconvert" the string parameters to a data: URL.
   string16 data_url = CreateDataUrl(icon, title, text);
   Notification notif(origin, GURL(data_url), proxy);
   ShowNotification(notif);
   return true;
 }