Add DeviceADPolicyManager to provide AD policy.

chrome/browser/chromeos/policy/enrollment_handler_chromeos.cc

Index: chrome/browser/chromeos/policy/enrollment_handler_chromeos.cc
diff --git a/chrome/browser/chromeos/policy/enrollment_handler_chromeos.cc b/chrome/browser/chromeos/policy/enrollment_handler_chromeos.cc
index 7b8f085d350d68c19f46b791b791b491ce2eeca0..991bec4aa176a45880e0f94297ea4c3d9b797a3d 100644
--- a/chrome/browser/chromeos/policy/enrollment_handler_chromeos.cc
+++ b/chrome/browser/chromeos/policy/enrollment_handler_chromeos.cc
@@ -172,7 +172,7 @@ void EnrollmentHandlerChromeOS::OnPolicyFetched(CloudPolicyClient* client) {
   // If this is re-enrollment, make sure that the new policy matches the
   // previously-enrolled domain.
   std::string domain;
-  if (install_attributes_->IsEnterpriseDevice()) {
+  if (install_attributes_->IsEnterpriseManaged()) {
     domain = install_attributes_->GetDomain();
     validator->ValidateDomain(domain);
   }