aura: brightness and volume bubble.

chrome/browser/chromeos/volume_bubble.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_VOLUME_BUBBLE_H_
 #define CHROME_BROWSER_CHROMEOS_VOLUME_BUBBLE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "chrome/browser/chromeos/setting_level_bubble.h"
+#include "views/widget/widget.h"
 
 template <typename T> struct DefaultSingletonTraits;
 
 namespace chromeos {
 
 // Singleton class controlling volume bubble.
-class VolumeBubble : public SettingLevelBubble {
+class VolumeBubble : public views::Widget::Observer {
  public:
+  // Returns the singleton volume bubble instance.
   static VolumeBubble* GetInstance();
 
+  // views::Widget::Observer overrides:
+  void OnWidgetClosing(views::Widget* widget) OVERRIDE;
+
+  // Updates the target |percent| and icon to be used, sets
+  // the bubble to |enabled| and shows the bubble.
+  void ShowBubble(double percent, bool enabled);
+
+  // Hides the bubble.
+  void HideBubble();
+
  private:
   friend struct DefaultSingletonTraits<VolumeBubble>;
 
   VolumeBubble();
-  virtual ~VolumeBubble() {}
+  virtual ~VolumeBubble();
+
+  // Bubble widget.
+  views::Widget* widget_;
+
+  FRIEND_TEST_ALL_PREFIXES(VolumeBubbleTest, GetInstanceAndShow);
 
   DISALLOW_COPY_AND_ASSIGN(VolumeBubble);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_VOLUME_BUBBLE_H_