Drop the -webkit prefix from user-select CSS rule in ui/.

ui/webui/resources/css/list.css

Index: ui/webui/resources/css/list.css
diff --git a/ui/webui/resources/css/list.css b/ui/webui/resources/css/list.css
index e4d756a967b3a9af5a6b91bac302715089ad81a2..fb1b2e0564e594cfd0fc91b3c88ee659eb732679 100644
--- a/ui/webui/resources/css/list.css
+++ b/ui/webui/resources/css/list.css
@@ -13,7 +13,6 @@ grid {
 
 list > *,
 grid > * {
-  -webkit-user-select: none;
   background-color: rgba(255, 255, 255, 0);
   border: 1px solid rgba(255, 255, 255, 0); /* transparent white */
   border-radius: 2px;
@@ -24,6 +23,7 @@ grid > * {
   padding: 0 3px;
   position: relative; /* to allow overlap */
   text-overflow: ellipsis;
+  user-select: none;
   white-space: pre;
 }