[Cleanup] Remove mac code from aura/ash/views

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/ash_constants.h"
 #include "ash/shell.h"
 #include "ash/system/brightness/brightness_control_delegate.h"
@@ skipping 71 matching lines @@
   }
 
   // Overridden from views:SliderListener.
   virtual void SliderValueChanged(views::Slider* sender,
                                   float value,
                                   float old_value,
                                   views::SliderChangeReason reason) OVERRIDE {
     DCHECK_EQ(sender, slider_);
     if (reason != views::VALUE_CHANGED_BY_USER)
       return;
-#if !defined(OS_MACOSX)
     AcceleratorController* ac = Shell::GetInstance()->accelerator_controller();
     if (ac->brightness_control_delegate()) {
       double percent = std::max(value * 100.0, kMinBrightnessPercent);
       ac->brightness_control_delegate()->SetBrightnessPercent(percent, true);
     }
-#endif  // OS_MACOSX
   }
 
   // Overridden from views:SliderListener.
   virtual void SliderDragStarted(views::Slider* slider) OVERRIDE {
     DCHECK_EQ(slider, slider_);
     dragging_ = true;
   }
 
   // Overridden from views:SliderListener.
   virtual void SliderDragEnded(views::Slider* slider) OVERRIDE {
@@ skipping 101 matching lines @@
     return;
 
   if (brightness_view_)
     SetDetailedViewCloseDelay(kTrayPopupAutoCloseDelayInSeconds);
   else
     PopupDetailedView(kTrayPopupAutoCloseDelayInSeconds, false);
 }
 
 }  // namespace internal
 }  // namespace ash