Support chrome.windows extension API events for browserless Panels.

chrome/browser/ui/panels/panel_manager.cc

 // Copyright (c) 2012 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/ui/panels/panel_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 194 matching lines @@
     panel->SetAutoResizable(true);
   }
 
   // Add the panel to the docked strip.
   // Delay layout refreshes in case multiple panels are created within
   // a short time of one another or the focus changes shortly after panel
   // is created to avoid excessive screen redraws.
   docked_strip_->AddPanel(panel, PanelStrip::DELAY_LAYOUT_REFRESH);
   docked_strip_->UpdatePanelOnStripChange(panel);
 
+  content::NotificationService::current()->Notify(
+      chrome::NOTIFICATION_PANEL_OPENED,
+      content::Source<Panel>(panel),
+      content::NotificationService::NoDetails());
+
   return panel;
 }
 
 void PanelManager::OnPanelClosed(Panel* panel) {
   if (num_panels() == 1) {
     display_settings_provider_->RemoveFullScreenObserver(this);
   }
 
   drag_controller_->OnPanelClosed(panel);
   resize_controller_->OnPanelClosed(panel);
@@ skipping 123 matching lines @@
 void PanelManager::SetMouseWatcher(PanelMouseWatcher* watcher) {
   panel_mouse_watcher_.reset(watcher);
 }
 
 void PanelManager::OnPanelAnimationEnded(Panel* panel) {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_PANEL_BOUNDS_ANIMATIONS_FINISHED,
       content::Source<Panel>(panel),
       content::NotificationService::NoDetails());
 }