chromeos: Minor changes to volume/brightness bubble UI.

chrome/browser/chromeos/setting_level_bubble.cc

 // Copyright (c) 2011 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 "chrome/browser/chromeos/setting_level_bubble.h"
 
 #include <gdk/gdk.h>
 
 #include "base/timer.h"
 #include "chrome/browser/chromeos/login/background_view.h"
@@ skipping 112 matching lines @@
         monitor_area.bottom() - view_size.height() / 2 - kBubbleBottomGap,
         0, 0);
 
     // ShowFocusless doesn't set ESC accelerator.
     bubble_ = Bubble::ShowFocusless(parent_widget,
                                     position_relative_to,
                                     BubbleBorder::FLOAT,
                                     view_,  // contents
                                     this,   // delegate
                                     true);  // show while screen is locked
+    bubble_->set_fade_away_on_close(true);
   } else {
     DCHECK(view_);
     timeout_timer_.Stop();
     view_->SetIcon(icon);
   }
 
   view_->SetEnabled(enabled);
 
   if (animation_.is_animating())
     animation_.End();
@@ skipping 56 matching lines @@
 void SettingLevelBubble::AnimationProgressed(const ui::Animation* animation) {
   if (view_) {
     view_->SetLevel(
         ui::Tween::ValueBetween(animation->GetCurrentValue(),
                                 previous_percent_,
                                 current_percent_));
   }
 }
 
 }  // namespace chromeos