Implement material throbber and use it in one place (Autofill card

chrome/browser/ui/views/autofill/card_unmask_prompt_views.h

Index: chrome/browser/ui/views/autofill/card_unmask_prompt_views.h
diff --git a/chrome/browser/ui/views/autofill/card_unmask_prompt_views.h b/chrome/browser/ui/views/autofill/card_unmask_prompt_views.h
index 631828437ea07500dbe1b7264b1d2293e9f85ea8..b272480daa69d8c5d64cef1f74b0e5238ad9d3d8 100644
--- a/chrome/browser/ui/views/autofill/card_unmask_prompt_views.h
+++ b/chrome/browser/ui/views/autofill/card_unmask_prompt_views.h
@@ -17,7 +17,7 @@ namespace views {
 class ImageView;
 class Label;
 class Checkbox;
-class CheckmarkThrobber;
+class MaterialThrobber;
 }
 
 namespace autofill {
@@ -135,7 +135,7 @@ class CardUnmaskPromptViews : public CardUnmaskPromptView,
   views::Checkbox* storage_checkbox_;
 
   FadeOutView* progress_overlay_;
-  views::CheckmarkThrobber* progress_throbber_;
+  views::MaterialThrobber* progress_throbber_;
   views::Label* progress_label_;
 
   gfx::SlideAnimation overlay_animation_;