Implement an indeterminate progress-bar

ui/message_center/views/notification_view.h

Index: ui/message_center/views/notification_view.h
diff --git a/ui/message_center/views/notification_view.h b/ui/message_center/views/notification_view.h
index 07c47e4b6fde2c22c8d835ad9a1c4c18268f69f4..00c83644ba12748beeb2f82dcd21e817158e9928 100644
--- a/ui/message_center/views/notification_view.h
+++ b/ui/message_center/views/notification_view.h
@@ -24,6 +24,8 @@ class BoundedLabel;
 class MessageCenter;
 class MessageCenterController;
 class NotificationButton;
+class NotificationProgressBar;
+class NotificationIndeterminateProgressBar;
 class NotificationView;
 class PaddedButton;
 class ProportionalImageView;
@@ -99,6 +101,8 @@ class MESSAGE_CENTER_EXPORT NotificationView
   void CreateOrUpdateContextMessageView(const Notification& notification);
   void CreateOrUpdateSettingsButtonView(const Notification& notification);
   void CreateOrUpdateProgressBarView(const Notification& notification);
+  void CreateOrUpdateIndeterminateProgressBarView(
+      const Notification& notification);
   void CreateOrUpdateListItemViews(const Notification& notification);
   void CreateOrUpdateIconView(const Notification& notification);
   void CreateOrUpdateImageView(const Notification& notification);
@@ -129,7 +133,8 @@ class MESSAGE_CENTER_EXPORT NotificationView
   views::View* bottom_view_;
   views::View* image_container_;
   ProportionalImageView* image_view_;
-  views::ProgressBar* progress_bar_view_;
+  NotificationProgressBar* progress_bar_view_;
+  NotificationIndeterminateProgressBar* indeterminate_progress_bar_view_;

[Jun Mukai, 2015/11/24 17:51:12]

I don't think we should have two different instance variables, they would share
the same interface, and they are placed in the same position. I proposed to
split class because they make different visual effects.

So, NotificationView will recreate the view instance and swap
|progress_bar_view_| upon intermediate flag.

[yoshiki, 2015/11/25 15:14:28]

Done.

   std::vector<NotificationButton*> action_buttons_;
   std::vector<views::View*> separators_;