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

chrome/browser/notifications/balloon_collection.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_collection.h"
 
 #include "base/gfx/rect.h"
 #include "base/logging.h"
 #include "base/stl_util-inl.h"
 #include "chrome/browser/notifications/balloon.h"
@@ skipping 27 matching lines @@
   Balloon* new_balloon = MakeBalloon(notification, profile);
   balloons_.push_back(new_balloon);
   PositionBalloons(false);
   new_balloon->Show();
 
   // There may be no listener in a unit test.
   if (space_change_listener_)
     space_change_listener_->OnBalloonSpaceChanged();
 }
 
+bool BalloonCollectionImpl::Remove(const Notification& notification) {
+  Balloons::iterator iter;
+  for (iter = balloons_.begin(); iter != balloons_.end(); ++iter) {
+    if (notification.IsSame((*iter)->notification())) {
+      // Balloon.CloseByScript() will cause OnBalloonClosed() to be called on
+      // this object, which will remove it from the collection and free it.
+      (*iter)->CloseByScript();
+      return true;
+    }
+  }
+  return false;
+}
+
 bool BalloonCollectionImpl::HasSpace() const {
   if (count() < kMinAllowedBalloonCount)
     return true;
 
   int max_balloon_size = 0;
   int total_size = 0;
   layout_.GetMaxLinearSize(&max_balloon_size, &total_size);
 
   int current_max_size = max_balloon_size * count();
   int max_allowed_size = static_cast<int>(total_size *
@@ skipping 105 matching lines @@
       position_iterator->set_y(position_iterator->y() - balloon_size.height());
       x = position_iterator->x() - balloon_size.width();
       y = position_iterator->y();
       break;
     default:
       NOTREACHED();
       break;
   }
   return gfx::Point(x, y);
 }