Block the autohide of the launcher when 'quiet mode' bubble is shown for notifications.

ash/system/web_notification/web_notification_tray.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 "ash/system/web_notification/web_notification_tray.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/system/tray/tray_bubble_wrapper.h"
@@ skipping 183 matching lines @@
     }
     HidePopupBubble();
   } else {
     if (show_message_center_on_unlock_)
       ShowMessageCenterBubble();
     show_message_center_on_unlock_ = false;
   }
   UpdateTray();
 }
 
+bool WebNotificationTray::ShouldBlockLauncherAutoHide() const {
+  return IsMessageCenterBubbleVisible() || quiet_mode_bubble() != NULL;
+}
+
 bool WebNotificationTray::IsMessageCenterBubbleVisible() const {
   return (message_center_bubble() &&
           message_center_bubble_->bubble()->IsVisible());
 }
 
 bool WebNotificationTray::IsMouseInNotificationBubble() const {
   if (!popup_bubble())
     return false;
   return popup_bubble_->bubble_view()->GetBoundsInScreen().Contains(
       Shell::GetScreen()->GetCursorScreenPoint());
@@ skipping 172 matching lines @@
 
 message_center::MessagePopupBubble*
 WebNotificationTray::GetPopupBubbleForTest() {
   if (!popup_bubble_.get())
     return NULL;
   return static_cast<message_center::MessagePopupBubble*>(
       popup_bubble_->bubble());
 }
 
 }  // namespace ash