Support policy registration using a preobtained access token.

chrome/browser/policy/cloud/user_policy_signin_service_base.cc

 // Copyright 2013 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/policy/cloud/user_policy_signin_service_base.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 133 matching lines @@
     manager->core()->client()->RemoveObserver(this);
   if (manager && manager->core()->service())
     manager->core()->service()->RemoveObserver(this);
 }
 
 scoped_ptr<CloudPolicyClient>
 UserPolicySigninServiceBase::CreateClientForRegistrationOnly(
     const std::string& username) {
   DCHECK(!username.empty());
   // We should not be called with a client already initialized.
+#if !defined(OS_IOS)
+  // On iOS we check if an account has policy while the profile is signed in
+  // to another account.
   DCHECK(!policy_manager() || !policy_manager()->core()->client());
+#endif
 
   // If the user should not get policy, just bail out.
   if (!policy_manager() || !ShouldLoadPolicyForUser(username)) {
     DVLOG(1) << "Signed in user is not in the whitelist";
     return scoped_ptr<CloudPolicyClient>();
   }
 
   // If the DeviceManagementService is not yet initialized, start it up now.
   device_management_service_->ScheduleInitialization(0);
 
@@ skipping 94 matching lines @@
 }
 
 scoped_refptr<net::URLRequestContextGetter>
 UserPolicySigninServiceBase::CreateUserRequestContext(
     scoped_refptr<net::URLRequestContextGetter> profile_request_context) {
   return new UserPolicyRequestContext(
       profile_request_context, system_request_context(), GetUserAgent());
 }
 
 }  // namespace policy