Scaffold for MD-Settings, inside chrome://md-settings.

chrome/browser/resources/settings/settings_ui/settings_ui.css

Index: chrome/browser/resources/settings/settings_ui/settings_ui.css
diff --git a/ui/webui/resources/cr_elements/cr_collapse/cr_collapse.css b/chrome/browser/resources/settings/settings_ui/settings_ui.css
similarity index 62%
copy from ui/webui/resources/cr_elements/cr_collapse/cr_collapse.css
copy to chrome/browser/resources/settings/settings_ui/settings_ui.css
index 2585b3faf0ecda54cec882da4049426665ac8122..75e094e92f9a3d390e0ec4422fa4b23a7dcf416f 100644
--- a/ui/webui/resources/cr_elements/cr_collapse/cr_collapse.css
+++ b/chrome/browser/resources/settings/settings_ui/settings_ui.css
@@ -1,11 +1,11 @@
-/* Copyright 2015 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. */
-
-:host {
-  display: block;
-}
-
-:host(.cr-collapse-closed) {
-  display: none;
-}
+/* Copyright 2015 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. */
+
+:host {
+  -webkit-user-select: none;
+  background-color: rgb(219, 222, 224);
+  display: block;
+  font-family: Roboto;
+  height: 100%;
+}