Implement a second version of the credentials passing API

chrome/browser/chromeos/login/saml/saml_browsertest.cc

Index: chrome/browser/chromeos/login/saml/saml_browsertest.cc
diff --git a/chrome/browser/chromeos/login/saml/saml_browsertest.cc b/chrome/browser/chromeos/login/saml/saml_browsertest.cc
index 9657f704d53a848737ebcf7b3e394f06bebb7c89..a0296a04ca63d6931aa0f08e25a7bffecd469801 100644
--- a/chrome/browser/chromeos/login/saml/saml_browsertest.cc
+++ b/chrome/browser/chromeos/login/saml/saml_browsertest.cc
@@ -417,9 +417,26 @@ IN_PROC_BROWSER_TEST_F(SamlTest, SamlUI) {
   JsExpect("!$('gaia-signin').classList.contains('saml')");
 }
 
-// Tests the sign-in flow when the credentials passing API is used.
-IN_PROC_BROWSER_TEST_F(SamlTest, CredentialPassingAPI) {
-  fake_saml_idp()->SetLoginHTMLTemplate("saml_api_login.html");
+// Tests the sign-in flow when version 1 of the credentials passing API is used.
+IN_PROC_BROWSER_TEST_F(SamlTest, CredentialPassingAPIV1) {
+  fake_saml_idp()->SetLoginHTMLTemplate("saml_api_login_v1.html");
+  fake_saml_idp()->SetLoginAuthHTMLTemplate("saml_api_login_auth.html");
+  StartSamlAndWaitForIdpPageLoad(kFirstSAMLUserEmail);
+
+  // Fill-in the SAML IdP form and submit.
+  SetSignFormField("Email", "fake_user");
+  SetSignFormField("Password", "fake_password");
+  ExecuteJsInSigninFrame("document.getElementById('Submit').click();");
+
+  // Login should finish login and a session should start.
+  content::WindowedNotificationObserver(
+      chrome::NOTIFICATION_SESSION_STARTED,
+      content::NotificationService::AllSources()).Wait();
+}
+
+// Tests the sign-in flow when version 2 of the credentials passing API is used.
+IN_PROC_BROWSER_TEST_F(SamlTest, CredentialPassingAPIV2) {
+  fake_saml_idp()->SetLoginHTMLTemplate("saml_api_login_v2.html");
   fake_saml_idp()->SetLoginAuthHTMLTemplate("saml_api_login_auth.html");
   StartSamlAndWaitForIdpPageLoad(kFirstSAMLUserEmail);