Extract ArcTermsOfServiceNegotiator implementation.

chrome/browser/chromeos/arc/arc_session_manager_browsertest.cc

 // Copyright 2016 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 <memory>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 135 matching lines @@
     profile_builder.SetProfileName(kFakeUserName);
     profile_builder.AddTestingFactory(
         ProfileOAuth2TokenServiceFactory::GetInstance(),
         BuildFakeProfileOAuth2TokenService);
     profile_ = profile_builder.Build();
     token_service_ = static_cast<FakeProfileOAuth2TokenService*>(
         ProfileOAuth2TokenServiceFactory::GetForProfile(profile()));
     token_service_->UpdateCredentials("", kRefreshToken);
 
     profile()->GetPrefs()->SetBoolean(prefs::kArcSignedIn, true);
+    profile()->GetPrefs()->SetBoolean(prefs::kArcTermsAccepted, true);
 
     const AccountId account_id(
         AccountId::FromUserEmailGaiaId(kFakeUserName, "1234567890"));
     GetFakeUserManager()->AddUser(account_id);
     GetFakeUserManager()->LoginUser(account_id);
 
     // Set up ARC for test profile.
     ArcServiceLauncher::Get()->OnPrimaryUserProfilePrepared(profile());
   }
 
@@ skipping 64 matching lines @@
   prefs->SetBoolean(prefs::kArcEnabled, true);
   token_service()->IssueTokenForAllPendingRequests(kManagedAuthToken,
                                                    base::Time::Max());
   ArcSessionManagerShutdownObserver observer;
   observer.Wait();
   ASSERT_EQ(ArcSessionManager::State::STOPPED,
             ArcSessionManager::Get()->state());
 }
 
 }  // namespace arc