cros: Fix WebviewLoginTest.Basic multiple login attempts.

chrome/browser/chromeos/login/webview_login_browsertest.cc

Index: chrome/browser/chromeos/login/webview_login_browsertest.cc
diff --git a/chrome/browser/chromeos/login/webview_login_browsertest.cc b/chrome/browser/chromeos/login/webview_login_browsertest.cc
index fab6c57804e4fbcf2b616077039d2a08143d8e26..872d821b113fafe5c5a6d2beed41f9bee525cfa9 100644
--- a/chrome/browser/chromeos/login/webview_login_browsertest.cc
+++ b/chrome/browser/chromeos/login/webview_login_browsertest.cc
@@ -46,8 +46,6 @@ class WebviewLoginTest : public OobeBaseTest {
           "});"));
 
     content::DOMMessageQueue message_queue;
-    GetLoginDisplay()->ShowSigninScreenForCreds("", "");
-
     std::string message;
     ASSERT_TRUE(message_queue.WaitForMessage(&message));
     EXPECT_EQ("\"GaiaReady\"", message);