aura: brightness and volume bubble.

chrome/browser/chromeos/brightness_bubble.h

Index: chrome/browser/chromeos/brightness_bubble.h
diff --git a/chrome/browser/chromeos/brightness_bubble.h b/chrome/browser/chromeos/brightness_bubble.h
index 7b5ed8c5cf9a47d2b7d197fba0829fb24dda93e3..d27db6f3a6f589cce06340b43d62203f1d3da1ad 100644
--- a/chrome/browser/chromeos/brightness_bubble.h
+++ b/chrome/browser/chromeos/brightness_bubble.h
@@ -8,21 +8,46 @@
 
 #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 brightness bubble.
-class BrightnessBubble : public SettingLevelBubble {
+class BrightnessBubble : public views::Widget::Observer {
  public:
+  // Returns the singleton brightness bubble instance.
   static BrightnessBubble* 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);
+
+  // Updates the bubble |percent| and |enabled| state. See
+  // comments at setting_level_bubble.h.
+  void UpdateWithoutShowingBubble(double percent, bool enabled);
+
+  // Hides the bubble.
+  void HideBubble();
+
  private:
   friend struct DefaultSingletonTraits<BrightnessBubble>;
 
   BrightnessBubble();
-  virtual ~BrightnessBubble() {}
+  virtual ~BrightnessBubble();
+
+  // Checks that widget has been created or is not closed.
+  // Creates widget if needed.
+  void MaybeCreateWidget(double percent, bool enabled);
+
+  // Bubble widget.
+  views::Widget* widget_;
+
+  FRIEND_TEST_ALL_PREFIXES(BrightnessBubbleTest, UpdateWithoutShowing);
 
   DISALLOW_COPY_AND_ASSIGN(BrightnessBubble);
 };