cros: Add SAML redirect banner for enrollment.

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

Index: chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment.css
diff --git a/chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment.css b/chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment.css
index d323a865c8737697367988c33523e58f1c863075..e64728fdb5dcfcaf9a6d0c51c686dd751a390750 100644
--- a/chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment.css
+++ b/chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment.css
@@ -90,3 +90,32 @@
 #oauth-enrollment .step-contents {
   -webkit-margin-after: 10px;
 }
+
+#oauth-saml-notice-container {
+  left: 0;
+  position: absolute;
+  right: 0;
+  text-align: center;
+  top: 62px;
+}
+
+#oauth-enrollment.saml {
+  padding: 97px 0 21px;
+}
+
+#oauth-enrollment.saml #oauth-enroll-signin-frame {
+  height: 444px;
+}
+
+#oauth-enrollment.saml #oauth-enrollment-controls,
+#oauth-enrollment.saml #oauth-enroll-signin-link-container {
+  -webkit-padding-end: 17px;
+}
+
+#oauth-enrollment:not(.saml) #oauth-saml-notice-container {
+  display: none;
+}
+
+#oauth-saml-notice-message {
+  margin: 0 auto;
+}