aura: brightness and volume bubble.

chrome/browser/chromeos/volume_bubble_view_views.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_VIEW_VIEWS_H_
+#define CHROME_BROWSER_CHROMEOS_VOLUME_BUBBLE_VIEW_VIEWS_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "chrome/browser/chromeos/setting_level_bubble_view_views.h"
+
+template <typename T> struct DefaultSingletonTraits;
+
+namespace views {
+class Widget;
+}
+
+namespace chromeos {
+
+// Singleton class controlling volume bubble.
+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() {}
+
+  DISALLOW_COPY_AND_ASSIGN(VolumeBubble);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_VOLUME_BUBBLE_VIEW_VIEWS_H_