Changes how we detect whether the launcher should be shown when

ash/system/tray/system_tray.h

 // 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.
 
 #ifndef ASH_SYSTEM_TRAY_SYSTEM_TRAY_H_
 #define ASH_SYSTEM_TRAY_SYSTEM_TRAY_H_
 #pragma once
 
 #include "ash/launcher/background_animator.h"
 #include "ash/ash_export.h"
@@ skipping 44 matching lines @@
 
   // Shows details of a particular item. If |close_delay_in_seconds| is
   // non-zero, then the view is automatically closed after the specified time.
   void ShowDetailedView(SystemTrayItem* item,
                         int close_delay_in_seconds,
                         bool activate);
 
   // Updates the items when the login status of the system changes.
   void UpdateAfterLoginStatusChange(user::LoginStatus login_status);
 
+  // Returns true if a bubble is currently showing.
+  bool showing_bubble() const { return bubble_ != NULL; }
+
   const ScopedVector<SystemTrayItem>& items() const { return items_; }
 
   // Sets whether the tray paints a background. Default is true, but is set to
   // false if a window overlaps the shelf.
   void SetPaintsBackground(
       bool value,
       internal::BackgroundAnimator::ChangeType change_type);
 
   AccessibilityObserver* accessibility_observer() const {
     return accessibility_observer_;
@@ skipping 79 matching lines @@
   internal::SystemTrayBackground* background_;
 
   internal::BackgroundAnimator background_animator_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemTray);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_SYSTEM_TRAY_H_