Added multi-profile support for attestation on chromeos.

chrome/browser/chromeos/attestation/attestation_policy_observer.cc

Index: chrome/browser/chromeos/attestation/attestation_policy_observer.cc
diff --git a/chrome/browser/chromeos/attestation/attestation_policy_observer.cc b/chrome/browser/chromeos/attestation/attestation_policy_observer.cc
index 2734706100a73cb695ad10800907262662a7c27e..b299741a983464312946d7d720b941073c6422e6 100644
--- a/chrome/browser/chromeos/attestation/attestation_policy_observer.cc
+++ b/chrome/browser/chromeos/attestation/attestation_policy_observer.cc
@@ -172,6 +172,7 @@ void AttestationPolicyObserver::Start() {
                  weak_factory_.GetWeakPtr());
   cryptohome_client_->TpmAttestationDoesKeyExist(
       KEY_DEVICE,
+      std::string(),  // Not used.
       kEnterpriseMachineKey,
       base::Bind(DBusBoolRedirectCallback,
                  on_does_exist,
@@ -200,6 +201,7 @@ void AttestationPolicyObserver::GetNewCertificate() {
 void AttestationPolicyObserver::GetExistingCertificate() {
   cryptohome_client_->TpmAttestationGetCertificate(
       KEY_DEVICE,
+      std::string(),  // Not used.
       kEnterpriseMachineKey,
       base::Bind(DBusStringCallback,
                  base::Bind(&AttestationPolicyObserver::CheckCertificateExpiry,
@@ -257,6 +259,7 @@ void AttestationPolicyObserver::GetKeyPayload(
     base::Callback<void(const std::string&)> callback) {
   cryptohome_client_->TpmAttestationGetKeyPayload(
       KEY_DEVICE,
+      std::string(),  // Not used.
       kEnterpriseMachineKey,
       base::Bind(DBusStringCallback,
                  callback,
@@ -285,6 +288,7 @@ void AttestationPolicyObserver::MarkAsUploaded(const std::string& key_payload) {
   }
   cryptohome_client_->TpmAttestationSetKeyPayload(
       KEY_DEVICE,
+      std::string(),  // Not used.
       kEnterpriseMachineKey,
       new_payload,
       base::Bind(DBusBoolRedirectCallback,