aura: brightness and volume bubble.

chrome/browser/chromeos/volume_bubble.h

Index: chrome/browser/chromeos/volume_bubble.h
diff --git a/chrome/browser/chromeos/volume_bubble.h b/chrome/browser/chromeos/volume_bubble.h
index 17f72fc1a19190531045f546058336a2b61af3e0..f01225579e671b373170ddffdf8e436b4972cfb5 100644
--- a/chrome/browser/chromeos/volume_bubble.h
+++ b/chrome/browser/chromeos/volume_bubble.h
@@ -11,16 +11,24 @@
 
 template <typename T> struct DefaultSingletonTraits;
 
+namespace views {
+class Widget;
+}
+
 namespace chromeos {
 
 // Singleton class controlling volume bubble.
-class VolumeBubble : public SettingLevelBubble {
+class VolumeBubble {
  public:
   static VolumeBubble* GetInstance();
+  static void ShowBubble(double percent, bool enabled);
+  void HideBubble();
 
  private:
   friend struct DefaultSingletonTraits<VolumeBubble>;
 
+  // Bubble widget, owned by VolumeBubble.
+  static views::Widget* widget_;
   VolumeBubble();
   virtual ~VolumeBubble() {}