cros: Replace WizardController string constants with OobeScreen values.

chrome/browser/chromeos/login/screens/base_screen.h

 // Copyright (c) 2012 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_SCREENS_BASE_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_BASE_SCREEN_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
+#include "chrome/browser/chromeos/login/oobe_screen.h"
 #include "chrome/browser/chromeos/login/screens/base_screen_delegate.h"
 #include "components/login/base_screen_handler_utils.h"
 #include "components/login/screens/screen_context.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace chromeos {
 
 class ModelViewChannel;
 
 // Base class for the all OOBE/login/before-session screens.
 // Screens are identified by ID, screen and it's JS counterpart must have same
 // id.
 // Most of the screens will be re-created for each appearance with Initialize()
 // method called just once.
 class BaseScreen {
  public:
   explicit BaseScreen(BaseScreenDelegate* base_screen_delegate,
-                      const std::string& screen_id);
+                      OobeScreen screen_id);
   virtual ~BaseScreen();
 
   // ---- Old implementation ----
 
   // Makes wizard screen visible.
   virtual void Show() = 0;
 
   // Makes wizard screen invisible.
   virtual void Hide() = 0;
 
@@ skipping 13 matching lines @@
   // Called when we navigate from screen so that we will never return to it.
   // This is a last chance to call JS counterpart, this object will be deleted
   // soon.
   virtual void OnClose();
 
   // Indicates whether status area should be displayed while this screen is
   // displayed.
   virtual bool IsStatusAreaDisplayed();
 
   // Returns the identifier of the screen.
-  const std::string& screen_id() const { return screen_id_; }
+  OobeScreen screen_id() const { return screen_id_; }
 
   // Called when user action event with |event_id|
   // happened. Notification about this event comes from the JS
   // counterpart.
   virtual void OnUserAction(const std::string& action_id);
 
   void set_model_view_channel(ModelViewChannel* channel) { channel_ = channel; }
 
  protected:
   // Scoped context editor, which automatically commits all pending
@@ skipping 67 matching lines @@
 
   // Called when context for the current screen was
   // changed. Notification about this event comes from the JS
   // counterpart.
   void OnContextChanged(const base::DictionaryValue& diff);
 
   ModelViewChannel* channel_ = nullptr;
 
   BaseScreenDelegate* base_screen_delegate_ = nullptr;
 
-  const std::string screen_id_;
+  const OobeScreen screen_id_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_BASE_SCREEN_H_