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

chrome/browser/renderer_host/render_view_host.cc

Index: chrome/browser/renderer_host/render_view_host.cc
===================================================================
--- chrome/browser/renderer_host/render_view_host.cc	(revision 30967)
+++ chrome/browser/renderer_host/render_view_host.cc	(working copy)
@@ -831,6 +831,8 @@
                         OnShowDesktopNotification)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDesktopNotificationText,
                         OnShowDesktopNotificationText)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_CancelDesktopNotification,
+                        OnCancelDesktopNotification)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestNotificationPermission,
                         OnRequestNotificationPermission)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ExtensionRequest, OnExtensionRequest)
@@ -1677,6 +1679,13 @@
       DesktopNotificationService::PageNotification, notification_id);
 }
 
+void RenderViewHost::OnCancelDesktopNotification(int notification_id) {
+  DesktopNotificationService* service=
+      process()->profile()->GetDesktopNotificationService();
+  service->CancelDesktopNotification(
+      process()->id(), routing_id(), notification_id);
+}
+
 void RenderViewHost::OnRequestNotificationPermission(
     const GURL& source_origin, int callback_context) {
   DesktopNotificationService* service =