Fix legacy UI in Files.app.

chrome/browser/resources/file_manager/css/file_manager.css

Index: chrome/browser/resources/file_manager/css/file_manager.css
diff --git a/chrome/browser/resources/file_manager/css/file_manager.css b/chrome/browser/resources/file_manager/css/file_manager.css
index 033e27d18b632571792adca6f53aa9c9a5c11ee9..b79f9a87acc07b3749eec3237517f55d37b58603 100644
--- a/chrome/browser/resources/file_manager/css/file_manager.css
+++ b/chrome/browser/resources/file_manager/css/file_manager.css
@@ -714,16 +714,26 @@ body[new-ui] .breadcrumb-path:not(.breadcrumb-last) {
   -webkit-app-region: no-drag;
 }
 
-#search-breadcrumbs .breadcrumb-path {
+body:not([new-ui]) #search-breadcrumbs .breadcrumb-path {
   color: #888;
 }
 
-#search-breadcrumbs .breadcrumb-path:hover {
+body[new-ui] #search-breadcrumbs .breadcrumb-path {
+  color: #969696;
+}
+
+body[new-ui] #search-breadcrumbs .breadcrumb-path:hover,
+body:not([new-ui]) #search-breadcrumbs .breadcrumb-path:hover {
   color: #666;
 }
 
 /* The final breadcrumb, representing the current directory. */
-.breadcrumb-last {
+body[new-ui] #search-breadcrumbs .breadcrumb-path.breadcrumb-last {
+  color: #141414;
+  cursor: default;
+}
+
+body:not([new-ui]) .breadcrumb-last {
   color: black;
   cursor: default;
 }