Add support to previews/ for Server LoFi and LitePages

components/previews/core/previews_black_list.cc

Index: components/previews/core/previews_black_list.cc
diff --git a/components/previews/core/previews_black_list.cc b/components/previews/core/previews_black_list.cc
index ea5de7d822f6ebb8cf9d5504a500ad896895303a..f74cb45fa00d9e9797e994a3577c00c93e4ca35d 100644
--- a/components/previews/core/previews_black_list.cc
+++ b/components/previews/core/previews_black_list.cc
@@ -75,10 +75,17 @@ void PreviewsBlackList::AddPreviewNavigation(const GURL& url,
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(url.has_host());
   switch (type) {
+    case PreviewsType::LITE_PAGE:
+      UMA_HISTOGRAM_BOOLEAN("Previews.OptOut.UserOptedOut.LitePage", opt_out);
+      break;
+    case PreviewsType::SERVER_LOFI:
+      UMA_HISTOGRAM_BOOLEAN("Previews.OptOut.UserOptedOut.ServerLoFi", opt_out);
+      break;
     case PreviewsType::OFFLINE:
       UMA_HISTOGRAM_BOOLEAN("Previews.OptOut.UserOptedOut.Offline", opt_out);
       break;
-    default:
+    case PreviewsType::NONE:
+    case PreviewsType::LAST:
       NOTREACHED();
   }
   if (opt_out) {