Added usage of ScreenContext in EulaScreen.

chrome/browser/chromeos/login/screens/eula_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_EULA_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_EULA_SCREEN_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/chromeos/login/screens/base_screen.h"
-#include "chrome/browser/chromeos/login/screens/eula_screen_actor.h"
+#include "chrome/browser/chromeos/login/screens/eula_model.h"
 #include "chromeos/tpm_password_fetcher.h"
+#include "components/login/screens/screen_context.h"
 #include "url/gurl.h"
 
 namespace chromeos {
 
 // Representation independent class that controls OOBE screen showing EULA
 // to users.
-class EulaScreen : public BaseScreen,
-                   public EulaScreenActor::Delegate,
-                   public TpmPasswordFetcherDelegate {
+class EulaScreen : public EulaModel, public TpmPasswordFetcherDelegate {
  public:
   class Delegate {

[Denis Kuznetsov (DE-MUC), 2014/11/25 17:31:17]

Do we still need this delegate?

[ygorshenin1, 2014/11/26 11:45:40]

Yes, because only WizardController knows how to Set|Get Usage Statistics
Reporting.

    public:
     virtual ~Delegate() {}
 
     // Whether usage statistics reporting is enabled on EULA screen.
     virtual void SetUsageStatisticsReporting(bool val) = 0;
     virtual bool GetUsageStatisticsReporting() const = 0;
   };
 
   EulaScreen(BaseScreenDelegate* base_screen_delegate,
              Delegate* delegate,
-             EulaScreenActor* actor);
+             EulaView* view);
   virtual ~EulaScreen();
 
-  // BaseScreen implementation:
+  // EulaModel implementation:
   virtual void PrepareToShow() override;
   virtual void Show() override;
   virtual void Hide() override;
   virtual std::string GetName() const override;
-
-  // EulaScreenActor::Delegate implementation:
   virtual GURL GetOemEulaUrl() const override;
-  virtual void OnExit(bool accepted, bool usage_stats_enabled) override;
+  virtual void OnAcceptButtonClicked() override;
+  virtual void OnBackButtonClicked() override;
   virtual void InitiatePasswordFetch() override;
   virtual bool IsUsageStatsEnabled() const override;
-  virtual void OnActorDestroyed(EulaScreenActor* actor) override;
+  virtual void OnViewDestroyed(EulaView* view) override;
 
   // TpmPasswordFetcherDelegate implementation:
   virtual void OnPasswordFetched(const std::string& tpm_password) override;
 
  private:
+  void OnUsageStatisticsReportingChanged(
+      const ::login::ScreenContext::KeyType& key,
+      const base::Value& value);
+
   // URL of the OEM EULA page (on disk).
   GURL oem_eula_page_;
 
   // TPM password local storage. By convention, we clear the password
   // from TPM as soon as we read it. We store it here locally until
   // EULA screen is closed.
   // TODO(glotov): Sanitize memory used to store password when
   // it's destroyed.
   std::string tpm_password_;
 
   Delegate* delegate_;
 
-  EulaScreenActor* actor_;
+  EulaView* view_;
 
   TpmPasswordFetcher password_fetcher_;
 
+  scoped_ptr<::login::ScreenContext::KeyObserverSubscription> subscription_;
+
   DISALLOW_COPY_AND_ASSIGN(EulaScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_EULA_SCREEN_H_