Remove pre-MD code from TrayDetailsView.

ash/common/system/chromeos/audio/tray_audio.cc

 // Copyright 2014 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/common/system/chromeos/audio/tray_audio.h"
 
 #include "ash/common/system/chromeos/audio/audio_detailed_view.h"
 #include "ash/common/system/chromeos/audio/volume_view.h"
 #include "ash/common/system/tray/system_tray.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
+#include "ash/resources/vector_icons/vector_icons.h"
 #include "ash/root_window_controller.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "ui/display/display.h"
 #include "ui/display/manager/managed_display_info.h"
 #include "ui/display/screen.h"
 #include "ui/views/view.h"
 
 namespace ash {
 
 using chromeos::CrasAudioHandler;
@@ skipping 170 matching lines @@
     volume_view_->SetVolumeLevel(
         CrasAudioHandler::Get()->GetOutputVolumePercent() / 100.0f);
     volume_view_->Update();
   }
 
   if (audio_detail_view_)
     audio_detail_view_->Update();
 }
 
 }  // namespace ash