[Autofill] Tweak credit card signin promo visually.

chrome/browser/ui/autofill/autofill_popup_controller_impl.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/autofill/autofill_popup_controller_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 390 matching lines @@
 
   // All other message types are defined here.
   PopupItemId id = static_cast<PopupItemId>(suggestions_[index].frontend_id);
   switch (id) {
     case POPUP_ITEM_ID_WARNING_MESSAGE:
       return warning_font_list_;
     case POPUP_ITEM_ID_CLEAR_FORM:
     case POPUP_ITEM_ID_AUTOFILL_OPTIONS:
     case POPUP_ITEM_ID_SCAN_CREDIT_CARD:
     case POPUP_ITEM_ID_SEPARATOR:
+      return normal_font_list_;
     case POPUP_ITEM_ID_CREDIT_CARD_SIGNIN_PROMO:
-      return normal_font_list_;
+      return smaller_font_list_;
     case POPUP_ITEM_ID_TITLE:
     case POPUP_ITEM_ID_AUTOCOMPLETE_ENTRY:
     case POPUP_ITEM_ID_DATALIST_ENTRY:
     case POPUP_ITEM_ID_PASSWORD_ENTRY:
       return bold_font_list_;
   }
   NOTREACHED();
   return normal_font_list_;
 }
 
@@ skipping 147 matching lines @@
   // Don't clear view_, because otherwise the popup will have to get regenerated
   // and this will cause flickering.
   suggestions_.clear();
   elided_values_.clear();
   elided_labels_.clear();
 
   selected_line_ = kNoSelection;
 }
 
 }  // namespace autofill