Disable flaky test SAMLEnrollmentTest.WithoutCredentialsPassingAPI.

TBR=xiyuan@chromium.org

Bug: 1030393
Change-Id: Ia1255af64bc57ef0bd5d9a43fc781c1a79cf07f5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1947460Reviewed-by: Roger Tawa <rogerta@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Roger Tawa <rogerta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721166}

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

@@ -1136,7 +1136,13 @@ void SAMLEnrollmentTest::StartSamlAndWaitForIdpPageLoad(
   OobeBaseTest::WaitForGaiaPageEvent("authFlowChange");
 }
 
-IN_PROC_BROWSER_TEST_F(SAMLEnrollmentTest, WithoutCredentialsPassingAPI) {
+// Flakily times out in debug builds. crbug.com/1030393
+#if !defined(NDEBUG)
+#define MAYBE_WithoutCredentialsPassingAPI DISABLED_WithoutCredentialsPassingAPI
+#else
+#define MAYBE_WithoutCredentialsPassingAPI WithoutCredentialsPassingAPI
+#endif
+IN_PROC_BROWSER_TEST_F(SAMLEnrollmentTest, MAYBE_WithoutCredentialsPassingAPI) {
   fake_saml_idp()->SetLoginHTMLTemplate("saml_login.html");
   StartSamlAndWaitForIdpPageLoad(kFirstSAMLUserEmail);