Files app: New styles for read-only indicator

Bug: 1058549
Change-Id: I82c1f7f2ed7cf8cf84a7a86ea0b800cd9988283b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2096157
Auto-Submit: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748581}

ui/file_manager/file_manager/foreground/css/file_manager.css

@@ -1391,6 +1391,12 @@ html[dir='rtl'] .breadcrumbs .separator {
   padding: 0 16px;
 }
 
+body.files-ng #read-only-indicator {
+  background-color: var(--google-grey-100);
+  padding-inline-end: 16px;
+  padding-inline-start: 12px;
+}
+
 body.check-select #read-only-indicator {
   display: none;
 }