Add AndroidManagementClient

chrome/browser/chromeos/policy/android_management_client.h

+// Copyright (c) 2016 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_CHROMEOS_POLICY_ANDROID_MANAGEMENT_CLIENT_H_
+#define CHROME_BROWSER_CHROMEOS_POLICY_ANDROID_MANAGEMENT_CLIENT_H_
+
+#include <memory>
+#include <string>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "components/policy/core/common/cloud/cloud_policy_constants.h"
+#include "google_apis/gaia/oauth2_token_service.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace enterprise_management {
+class DeviceManagementResponse;
+}
+
+namespace policy {
+
+class DeviceManagementRequestJob;
+class DeviceManagementService;
+
+// Interacts with the device management service and determines whether Android
+// management is enabled for the user or not. Uses the OAuth2TokenService to
+// acquire access tokens for the device management.
+class AndroidManagementClient : public OAuth2TokenService::Consumer {
+ public:
+  // Indicates result of the android management check.
+  enum Result {
+    RESULT_MANAGED,    // Android management is enabled.
+    RESULT_UNMANAGED,  // Android management is disabled.
+    RESULT_ERROR,      // Received a error.
+  };
+
+  // A callback which receives Result status of an operation.
+  using StatusCallback = base::Callback<void(Result)>;
+
+  AndroidManagementClient(
+      DeviceManagementService* service,
+      scoped_refptr<net::URLRequestContextGetter> request_context,
+      const std::string& account_id,
+      OAuth2TokenService* token_service);
+  ~AndroidManagementClient() override;
+
+  // Sends a check Android management request to the device management service.
+  void StartCheckAndroidManagement(const StatusCallback& callback);
+
+  // |access_token| is owned by caller and must exist before
+  // StartCheckAndroidManagement is called for testing.
+  static void SetAccessTokenForTesting(const char* access_token);
+
+ private:
+  // OAuth2TokenService::Consumer:
+  void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
+                         const std::string& access_token,
+                         const base::Time& expiration_time) override;
+  void OnGetTokenFailure(const OAuth2TokenService::Request* request,
+                         const GoogleServiceAuthError& error) override;
+
+  // Requests an access token.
+  void RequestAccessToken();
+
+  void CheckAndroidManagement(const std::string& access_token);

[Thiemo Nagel, 2016/04/28 13:26:59]

Please add comment.

[Polina Bondarenko, 2016/04/28 16:18:40]

Done.

+
+  // Callback for check Android management requests.
+  void OnAndroidManagementChecked(
+      DeviceManagementStatus status,
+      int net_error,
+      const enterprise_management::DeviceManagementResponse& response);
+
+  // Used to communicate with the device management service.
+  DeviceManagementService* service_;

[Thiemo Nagel, 2016/04/28 13:26:59]

I think that could be made a const pointer.

I'd prefer to call it |dm_service_| (or something similar).  Just |service_|
seems a little generic to me.

[Polina Bondarenko, 2016/04/28 16:18:40]

Done.

+  scoped_refptr<net::URLRequestContextGetter> request_context_;
+  std::unique_ptr<DeviceManagementRequestJob> request_job_;
+
+  // The account ID that will be used for the access token fetch.
+  const std::string account_id_;
+  // The token service used to retrieve the access token.
+  OAuth2TokenService* const token_service_;
+  // The OAuth request to receive the access token.
+  std::unique_ptr<OAuth2TokenService::Request> token_request_;
+
+  StatusCallback callback_;
+
+  base::WeakPtrFactory<AndroidManagementClient> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(AndroidManagementClient);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_CHROMEOS_POLICY_ANDROID_MANAGEMENT_CLIENT_H_