ChromeOS OOBE: Fix language and keyboard md-select look.

chrome/browser/resources/chromeos/login/oobe_i18n_dropdown.css

Index: chrome/browser/resources/chromeos/login/oobe_i18n_dropdown.css
diff --git a/chrome/browser/resources/chromeos/login/oobe_i18n_dropdown.css b/chrome/browser/resources/chromeos/login/oobe_i18n_dropdown.css
index 196a2206c1b1d9e16af9984fe373b63c96e4a531..659bb4f1d239ccd22cb9bb08b56b5dfd88b9f120 100644
--- a/chrome/browser/resources/chromeos/login/oobe_i18n_dropdown.css
+++ b/chrome/browser/resources/chromeos/login/oobe_i18n_dropdown.css
@@ -5,13 +5,5 @@
 :host {
   font-family: Roboto, sans-serif;
   font-size: 13px;
-  width: 240px;
-}
-
-#container {
-  height: 100%;
-}
-
-#container select  {
- width: 100%;
+  --md-select-width: 240px;
 }