chromeos: Show onscreen bubble when brightness changes.

chrome/browser/chromeos/setting_level_bubble.cc

Index: chrome/browser/chromeos/setting_level_bubble.cc
diff --git a/chrome/browser/chromeos/setting_level_bubble.cc b/chrome/browser/chromeos/setting_level_bubble.cc
index eb918e9caabbe5283eeb74937ecfc59dc5101fdc..8648237314a0bd4df62b4fa0efe854df8353a4cd 100644
--- a/chrome/browser/chromeos/setting_level_bubble.cc
+++ b/chrome/browser/chromeos/setting_level_bubble.cc
@@ -115,11 +115,15 @@ void SettingLevelBubble::ShowBubble(int percent) {
                        this, &SettingLevelBubble::OnTimeout);
 }
 
-void SettingLevelBubble::OnTimeout() {
+void SettingLevelBubble::HideBubble() {
   if (bubble_)
     bubble_->Close();
 }
 
+void SettingLevelBubble::OnTimeout() {
+  HideBubble();
+}
+
 void SettingLevelBubble::InfoBubbleClosing(InfoBubble* info_bubble, bool) {
   DCHECK(info_bubble == bubble_);
   timeout_timer_.Stop();