Mac Aura fails compile and some tests

ash/system/brightness/tray_brightness.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/brightness/tray_brightness.h"
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/shell.h"
 #include "ash/system/brightness/brightness_control_delegate.h"
 #include "ash/system/tray/system_tray_delegate.h"
@@ skipping 44 matching lines @@
   // Overridden from views:SliderListener.
   virtual void SliderValueChanged(views::Slider* sender,
                                   float value,
                                   float old_value,
                                   views::SliderChangeReason reason) OVERRIDE {
     if (reason != views::VALUE_CHANGED_BY_USER)
       return;
     // TODO(sad|davemoore): This isn't correct, since we are unable to pass on
     // the amount the brightness should be increased/decreased.
     // http://crosbug.com/26935
+#if !defined(OS_MACOSX)
     ash::Shell* shell = ash::Shell::GetInstance();
     if (value < old_value) {
       shell->accelerator_controller()->brightness_control_delegate()->
           HandleBrightnessDown(ui::Accelerator());
     } else {
       shell->accelerator_controller()->brightness_control_delegate()->
           HandleBrightnessUp(ui::Accelerator());
     }
+#endif  // OS_MACOSX
   }
 
   views::Slider* slider_;
 
   DISALLOW_COPY_AND_ASSIGN(BrightnessView);
 };
 
 }  // namespace tray
 
 TrayBrightness::TrayBrightness() {}
@@ skipping 30 matching lines @@
     brightness_view_->SetBrightnessLevel(percent);
     return;
   }
   if (!user_initiated)
     return;
   PopupDetailedView();
 }
 
 }  // namespace internal
 }  // namespace ash