Add initial device policy infrastructure.

chrome/browser/policy/device_policy_controller.h

Index: chrome/browser/policy/device_policy_controller.h
diff --git a/chrome/browser/policy/device_policy_controller.h b/chrome/browser/policy/device_policy_controller.h
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+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_POLICY_DEVICE_POLICY_CONTROLLER_H_
+#define CHROME_BROWSER_POLICY_DEVICE_POLICY_CONTROLLER_H_
+#pragma once
+
+#include "chrome/browser/policy/cloud_policy_controller.h"
+#include "chrome/common/notification_observer.h"
+#include "chrome/common/notification_registrar.h"
+
+class TokenService;
+
+namespace policy {
+
+// DM token provider that stores the token in CrOS signed settings.
+class DevicePolicyController : public CloudPolicyController,
+                               public NotificationObserver {
+ public:
+  DevicePolicyController();
+  virtual ~DevicePolicyController() {}
+
+  // CloudPolicyController implementation:
+  virtual std::string GetDeviceToken();
+  virtual std::string GetDeviceID();
+  virtual bool GetCredentials(std::string* username,
+                              std::string* auth_token);
+  virtual void OnTokenAvailable(const std::string& token);
+
+ private:
+  // Recheck whether all parameters are available and if so, trigger a
+  // credentials changed notification.
+  void CheckAndTriggerFetch();
+
+  // NotificationObserver method overrides:
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+  // The machine identifier.
+  std::string machine_id_;
+
+  // Current token. Empty if not available.
+  std::string device_token_;
+
+  // Whether to try and register. Device policy enrollment does not happen
+  // automatically except for the case that the device gets claimed. This
+  // situation is detected by listening for the OWNERSHIP_TAKEN notification.
+  bool should_register_;
+
+  // Registers the provider for notification of successful Gaia logins.
+  NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(DevicePolicyController);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_POLICY_DEVICE_POLICY_CONTROLLER_H_