cros: Replace WizardController string constants with OobeScreen values.

chrome/browser/chromeos/login/test/wizard_in_process_browser_test.cc

Index: chrome/browser/chromeos/login/test/wizard_in_process_browser_test.cc
diff --git a/chrome/browser/chromeos/login/test/wizard_in_process_browser_test.cc b/chrome/browser/chromeos/login/test/wizard_in_process_browser_test.cc
index d85876cd7f827d1e209fbcfa684cca49232c8bef..5c034b51f49910aa4665172024afdacfb73c728e 100644
--- a/chrome/browser/chromeos/login/test/wizard_in_process_browser_test.cc
+++ b/chrome/browser/chromeos/login/test/wizard_in_process_browser_test.cc
@@ -21,10 +21,8 @@
 
 namespace chromeos {
 
-WizardInProcessBrowserTest::WizardInProcessBrowserTest(const char* screen_name)
-    : screen_name_(screen_name),
-      host_(NULL) {
-}
+WizardInProcessBrowserTest::WizardInProcessBrowserTest(OobeScreen screen)
+    : screen_(screen) {}
 
 void WizardInProcessBrowserTest::SetUp() {
   WizardController::SetZeroDelays();
@@ -39,8 +37,8 @@ void WizardInProcessBrowserTest::SetUpCommandLine(
 
 void WizardInProcessBrowserTest::SetUpOnMainThread() {
   SetUpWizard();
-  if (!screen_name_.empty()) {
-    ShowLoginWizard(screen_name_);
+  if (screen_ != OobeScreen::SCREEN_UNKNOWN) {
+    ShowLoginWizard(screen_);
     host_ = LoginDisplayHost::default_host();
   }
 }