ash: Cleanup - remove unused private fields.

ash/system/chromeos/audio/audio_detailed_view.h

Index: ash/system/chromeos/audio/audio_detailed_view.h
diff --git a/ash/system/chromeos/audio/audio_detailed_view.h b/ash/system/chromeos/audio/audio_detailed_view.h
index 9995fe7d107980372313a64b0a0260a52da37cee..a8f0ba0dab134e6032ab684c5d02db0e12d74878 100644
--- a/ash/system/chromeos/audio/audio_detailed_view.h
+++ b/ash/system/chromeos/audio/audio_detailed_view.h
@@ -7,7 +7,6 @@
 
 #include "ash/system/tray/tray_details_view.h"
 #include "ash/system/tray/view_click_listener.h"
-#include "ash/system/user/login_status.h"
 #include "chromeos/audio/audio_device.h"
 
 #include "ui/gfx/font.h"
@@ -24,7 +23,7 @@ namespace tray {
 class AudioDetailedView : public TrayDetailsView,
                           public ViewClickListener {
  public:
-  AudioDetailedView(SystemTrayItem* owner, user::LoginStatus login);
+  explicit AudioDetailedView(SystemTrayItem* owner);
 
   virtual ~AudioDetailedView();
 
@@ -46,8 +45,6 @@ class AudioDetailedView : public TrayDetailsView,
   // Overridden from ViewClickListener.
   virtual void OnViewClicked(views::View* sender) override;
 
-  user::LoginStatus login_;
-
   typedef std::map<views::View*, chromeos::AudioDevice> AudioDeviceMap;
 
   chromeos::AudioDeviceList output_devices_;