Updates the mic icon status based on the device's audio state.

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

 // Copyright (c) 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/chromeos/chrome_browser_main_chromeos.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_switches.h"
@@ skipping 735 matching lines @@
   // Singletons are finally destroyed in AtExitManager.
   XInputHierarchyChangedEventListener::GetInstance()->Stop();
 
   DeviceUMA::GetInstance()->Stop();
 
   // SystemKeyEventListener::Shutdown() is always safe to call,
   // even if Initialize() wasn't called.
   SystemKeyEventListener::Shutdown();
 #endif
 
-  CrasAudioHandler::Shutdown();
-
   // Detach D-Bus clients before DBusThreadManager is shut down.
   power_button_observer_.reset();
   idle_action_warning_observer_.reset();
 
 #if !defined(USE_ATHENA)
   MagnificationManager::Shutdown();
 #endif
 
   AccessibilityManager::Shutdown();
 
@@ skipping 29 matching lines @@
 
   // We first call PostMainMessageLoopRun and then destroy UserManager, because
   // Ash needs to be closed before UserManager is destroyed.
   ChromeBrowserMainPartsLinux::PostMainMessageLoopRun();
 
   input_method::Shutdown();
 
   // Stops all in-flight OAuth2 token fetchers before the IO thread stops.
   DeviceOAuth2TokenServiceFactory::Shutdown();
 
+  // Shutdown after PostMainMessageLoopRun() which should destroy all observers.
+  CrasAudioHandler::Shutdown();
+
   // Called after
   // ChromeBrowserMainPartsLinux::PostMainMessageLoopRun() to be
   // executed after execution of chrome::CloseAsh(), because some
   // parts of WebUI depends on NetworkPortalDetector.
   NetworkPortalDetector::Shutdown();
 
   g_browser_process->platform_part()->DestroyChromeUserManager();
 
   g_browser_process->platform_part()->ShutdownSessionManager();
 }
 
 void ChromeBrowserMainPartsChromeos::PostDestroyThreads() {
   // Destroy DBus services immediately after threads are stopped.
   dbus_services_.reset();
 
   ChromeBrowserMainPartsLinux::PostDestroyThreads();
 
   // Destroy DeviceSettingsService after g_browser_process.
   DeviceSettingsService::Shutdown();
 }
 
 }  //  namespace chromeos