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

chrome/browser/notifications/balloon.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/balloon.h"
 
 #include "base/gfx/rect.h"
 #include "base/logging.h"
 #include "chrome/browser/notifications/balloon_collection.h"
 #include "chrome/browser/renderer_host/site_instance.h"
@@ skipping 18 matching lines @@
   balloon_view_.reset(balloon_view);
 }
 
 void Balloon::Show() {
   notification_.Display();
   if (balloon_view_.get()) {
     balloon_view_->Show(this);
   }
 }
 
-void Balloon::Close(bool by_user) {
+void Balloon::OnClose(bool by_user) {
   notification_.Close(by_user);
   if (close_listener_)
     close_listener_->OnBalloonClosed(this);
 }
+
+void Balloon::CloseByScript() {
+  // A user-initiated close begins with the view and then closes this object;
+  // we simulate that with a script-initiated close but pass |by_user|=false.
+  DCHECK(balloon_view_.get());
+  balloon_view_->Close(false);
+}