ash: Make sure all the sub-popups retain the same height as the main popup.

ash/system/tray/system_tray_bubble.h

Index: ash/system/tray/system_tray_bubble.h
diff --git a/ash/system/tray/system_tray_bubble.h b/ash/system/tray/system_tray_bubble.h
index a29e7488342e8db5a0051d04595d986bb16eb7ec..32a87d542389ef135424ab761619238fa2f3b6c3 100644
--- a/ash/system/tray/system_tray_bubble.h
+++ b/ash/system/tray/system_tray_bubble.h
@@ -75,6 +75,10 @@ class SystemTrayBubble : public base::MessagePumpObserver,
                    BubbleType bubble_type);
   virtual ~SystemTrayBubble();
 
+  // Change the items displayed in the bubble.
+  void UpdateView(const std::vector<ash::SystemTrayItem*>& items,
+                  BubbleType bubble_type);
+
   // Creates |bubble_view_| and a child views for each member of |items_|.
   // Also creates |bubble_widget_| and sets up animations.
   void InitView(views::View* anchor,
@@ -94,6 +98,8 @@ class SystemTrayBubble : public base::MessagePumpObserver,
   void Close();
 
  private:
+  void CreateItemViews(user::LoginStatus login_status);
+
   // Overridden from base::MessagePumpObserver.
   virtual base::EventStatus WillProcessEvent(
       const base::NativeEvent& event) OVERRIDE;