ScreenObserver::(Set|Get)UsageStatisticsReporting() are extracted into EulaScreen::Delegate.

chrome/browser/chromeos/login/screens/device_disabled_screen_unittest.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/screens/device_disabled_screen.h"
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/scoped_user_pref_update.h"
@@ skipping 29 matching lines @@
 
   // testing::Test:
   void SetUp() override;
   void TearDown() override;
 
   // ScreenObserver:
   MOCK_METHOD1(OnExit, void(ExitCodes));
   void ShowCurrentScreen() override;
   void OnSetUserNamePassword(const std::string& username,
                              const std::string& password) override;
-  void SetUsageStatisticsReporting(bool val) override;
-  bool GetUsageStatisticsReporting() const override;
   void SetHostConfiguration() override;
   void ConfigureHost(bool accepted_eula,
                      const std::string& lang,
                      const std::string& timezone,
                      bool send_reports,
                      const std::string& keyboard_layout) override;
   ErrorScreen* GetErrorScreen() override;
   void ShowErrorScreen() override;
   void HideErrorScreen(BaseScreen* parent_screen) override;
 
@@ skipping 35 matching lines @@
 }
 
 void DeviceDisabledScreenTest::ShowCurrentScreen() {
 }
 
 void DeviceDisabledScreenTest::OnSetUserNamePassword(
     const std::string& username,
     const std::string& password) {
 }
 
-void DeviceDisabledScreenTest::SetUsageStatisticsReporting(bool val) {
-}
-
-bool DeviceDisabledScreenTest::GetUsageStatisticsReporting() const {
-  return false;
-}
-
 void DeviceDisabledScreenTest::SetHostConfiguration() {
 }
 
 void DeviceDisabledScreenTest::ConfigureHost(
     bool accepted_eula,
     const std::string& lang,
     const std::string& timezone,
     bool send_reports,
     const std::string& keyboard_layout) {
 }
@@ skipping 81 matching lines @@
 // Verifies that the device disabled screen is shown when the device is marked
 // as disabled, device disabling is not turned off by flag and the device is not
 // owned yet.
 TEST_F(DeviceDisabledScreenTest, ShowWhenDisabledAndNotOwned) {
   SetDeviceDisabled(true);
   ExpectScreenToShow();
   TryToShowScreen();
 }
 
 }  // namespace chromeos