Enable web-based sign in flow by default. Can use command line argument

chrome/browser/ui/webui/bidi_checker_web_ui_test.cc

Index: chrome/browser/ui/webui/bidi_checker_web_ui_test.cc
diff --git a/chrome/browser/ui/webui/bidi_checker_web_ui_test.cc b/chrome/browser/ui/webui/bidi_checker_web_ui_test.cc
index e40e838f57ab6806dc2fa77d13fc9060ce0ce59a..17d35d9cca166f0fcc9c9dcc70fdd647b0815da8 100644
--- a/chrome/browser/ui/webui/bidi_checker_web_ui_test.cc
+++ b/chrome/browser/ui/webui/bidi_checker_web_ui_test.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/ui/webui/bidi_checker_web_ui_test.h"
 
 #include "base/base_paths.h"
+#include "base/command_line.h"
 #include "base/i18n/rtl.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
@@ -23,6 +24,7 @@
 #include "chrome/browser/prefs/session_startup_pref.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/browser_thread.h"
@@ -81,6 +83,19 @@ static const FilePath::CharType* kBidiCheckerTestsJS =
 
 WebUIBidiCheckerBrowserTest::~WebUIBidiCheckerBrowserTest() {}
 
+void WebUIBidiCheckerBrowserTest::SetUp() {
+  // The new web-based sign in flow does not use webui.  However, the old
+  // /CliengLogin flow does. Force this test to always run the old flow to make
+  // sure it does not regress.
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kUseClientLoginSigninFlow)) {
+        CommandLine::ForCurrentProcess()->AppendSwitch(
+            switches::kUseClientLoginSigninFlow);
+  }
+
+  WebUIBrowserTest::SetUp();
+}
+
 WebUIBidiCheckerBrowserTest::WebUIBidiCheckerBrowserTest() {}
 
 void WebUIBidiCheckerBrowserTest::SetUpInProcessBrowserTestFixture() {