Windows: Top-level bubbles no longer appear on taskbar by default.

chrome/browser/ui/views/message_center/message_center_widget_delegate.cc

 // Copyright 2013 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/views/message_center/message_center_widget_delegate.h"
 
 #include <complex>
 
 #include "chrome/browser/ui/views/message_center/message_center_frame_view.h"
 #include "content/public/browser/user_metrics.h"
@@ skipping 131 matching lines @@
 #if defined(USE_ASH)
   // This class is not used in Ash; there is another container for the message
   // center that's used there.  So, we must be in a Views + Ash environment.  We
   // want the notification center to be available on both desktops.  Setting the
   // |native_widget| variable here ensures that the widget is hosted on the
   // native desktop.
   params.native_widget = new views::DesktopNativeWidgetAura(widget);
 #endif
   widget->Init(params);
 
-#if defined(OS_WIN)
-  // Remove the Message Center from taskbar and alt-tab rotation.
-  HWND hwnd = views::HWNDForWidget(widget);
-  LONG_PTR ex_styles = ::GetWindowLongPtr(hwnd, GWL_EXSTYLE);
-  ex_styles |= WS_EX_TOOLWINDOW;
-  ::SetWindowLongPtr(hwnd, GWL_EXSTYLE, ex_styles);
-#endif
-
   widget->AddObserver(this);
   widget->StackAtTop();
   widget->SetAlwaysOnTop(true);
 
   const NotificationList::Notifications& notifications =
       tray_->message_center()->GetVisibleNotifications();
   SetNotifications(notifications);
 
   widget->SetBounds(GetMessageCenterBounds());
   widget->Show();
@@ skipping 69 matching lines @@
     bounds.set_y(corrected_anchor.y() - size.height());
   if (pos_info_.message_center_alignment & ALIGNMENT_LEFT)
     bounds.set_x(corrected_anchor.x());
   if (pos_info_.message_center_alignment & ALIGNMENT_RIGHT)
     bounds.set_x(corrected_anchor.x() - size.width());
 
   return bounds;
 }
 
 }  // namespace message_center