Created AttestationPolicyObserver.

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
new file mode 100644
index 0000000000000000000000000000000000000000..8ba5659a6ef403875a2752f2777ba6c988f7e2ed
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+++ b/chrome/browser/chromeos/attestation/attestation_policy_observer.cc
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+// Copyright (c) 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/chromeos/attestation/attestation_policy_observer.h"
+
+#include <string>
+
+#include "chrome/browser/policy/cloud/cloud_policy_client.h"
+#include "chrome/browser/policy/cloud/cloud_policy_manager.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "content/public/browser/notification_details.h"
+
+using std::string;
+
+namespace chromeos {
+namespace attestation {
+
+AttestationPolicyObserver::AttestationPolicyObserver(
+    CrosSettings* settings,
+    policy::CloudPolicyManager* policy_manager,
+    scoped_ptr<AttestationFlow> attestation_flow)
+    : settings_(settings),
+      policy_manager_(policy_manager),
+      attestation_flow_(attestation_flow.Pass()) {
+  settings_->AddSettingsObserver(kDeviceAttestationEnabled, this);
+}
+
+AttestationPolicyObserver::~AttestationPolicyObserver() {
+  settings_->RemoveSettingsObserver(kDeviceAttestationEnabled, this);
+}
+
+void AttestationPolicyObserver::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  string* path = content::Details<string>(details).ptr();
+  if (type != chrome::NOTIFICATION_SYSTEM_SETTING_CHANGED ||
+      *path != kDeviceAttestationEnabled) {
+    LOG(WARNING) << "AttestationPolicyObserver: Unexpected event received.";
+    return;
+  }
+
+  // If attestation is not enabled, there is nothing to do.
+  bool enabled = false;
+  if (!settings_->GetBoolean(kDeviceAttestationEnabled, &enabled) || !enabled)
+    return;
+
+  // We need a valid CloudPolicyClient to proceed.
+  policy::CloudPolicyClient* client = policy_manager_->core()->client();
+  if (!client) {
+    LOG(ERROR) << "AttestationPolicyObserver: Invalid CloudPolicyClient.";
+    return;
+  }
+
+  // TODO(dkrahn): Generate EMK and upload EMCert if necessary.
+}
+
+}  // namespace attestation
+}  // namespace chromeos