ash: Show better focus rects for the tray.

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 38 matching lines @@
     SetLayoutManager(new views::BoxLayout(views::BoxLayout::kHorizontal,
           kTrayPopupPaddingHorizontal, 0, kTrayPopupPaddingBetweenItems));
 
     views::ImageView* icon = new FixedSizedImageView(0, kTrayPopupItemHeight);
     gfx::Image image = ui::ResourceBundle::GetSharedInstance().GetImageNamed(
         IDR_AURA_UBER_TRAY_BRIGHTNESS);
     icon->SetImage(image.ToSkBitmap());
     AddChildView(icon);
 
     slider_ = new views::Slider(this, views::Slider::HORIZONTAL);
+    slider_->set_focus_color(kFocusBorderColor);
     slider_->SetValue(static_cast<float>(initial_percent / 100.0));
     slider_->SetAccessibleName(
         ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
             IDS_ASH_STATUS_TRAY_BRIGHTNESS));
     AddChildView(slider_);
   }
 
   virtual ~BrightnessView() {}
 
   // |percent| is in the range [0.0, 100.0].
@@ skipping 124 matching lines @@
     return;
 
   if (brightness_view_.get())
     SetDetailedViewCloseDelay(kTrayPopupAutoCloseDelayInSeconds);
   else
     PopupDetailedView(kTrayPopupAutoCloseDelayInSeconds, false);
 }
 
 }  // namespace internal
 }  // namespace ash