cros: Replace WizardController string constants with OobeScreen values.

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_TEST_WIZARD_IN_PROCESS_BROWSER_TEST_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_TEST_WIZARD_IN_PROCESS_BROWSER_TEST_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "chrome/browser/chromeos/login/oobe_screen.h"
 #include "chrome/test/base/in_process_browser_test.h"
 
 namespace chromeos {
 
 class LoginDisplayHost;
 
 // Base class for test related to login wizard and its screens.
 // Instead of creating Chrome browser window it creates login wizard window
 // with specified parameters and allows to customize environment at the
 // right moment in time before wizard is created.
 class WizardInProcessBrowserTest : public InProcessBrowserTest {
  public:
-  explicit WizardInProcessBrowserTest(const char* screen_name);
+  explicit WizardInProcessBrowserTest(OobeScreen screen);
 
   // Overridden from InProcessBrowserTest:
   void SetUp() override;
 
  protected:
   // Can be overriden by derived test fixtures to set up environment after
   // browser is created but wizard is not shown yet.
   virtual void SetUpWizard() {}
 
   // Overriden from InProcessBrowserTest:
   void SetUpOnMainThread() override;
   void SetUpCommandLine(base::CommandLine* command_line) override;
   void TearDownOnMainThread() override;
 
  private:
-  std::string screen_name_;
-  LoginDisplayHost* host_;
+  OobeScreen screen_;
+  LoginDisplayHost* host_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(WizardInProcessBrowserTest);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_TEST_WIZARD_IN_PROCESS_BROWSER_TEST_H_