Refactor OAuth2TokenService to have profile- and device-based implementations.

chrome/browser/chromeos/settings/device_oauth2_token_service.h

+// Copyright 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_OAUTH2_TOKEN_SERVICE_H_
+#define CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_OAUTH2_TOKEN_SERVICE_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/gtest_prod_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/signin/oauth2_token_service.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace net {
+class URLRequestContextGetter;
+}
+
+class GoogleServiceAuthError;
+class PrefRegistrySimple;
+class PrefService;
+class Profile;
+
+namespace chromeos {
+
+// DeviceOAuth2TokenService retrieves OAuth2 access tokens for a given
+// set of scopes using the device-level OAuth2 any-api refresh token
+// obtained during enterprise device enrollment.
+//
+// See |OAuth2TokenService| for usage details.
+//
+// Note that requests must be made from the UI thread.
+class DeviceOAuth2TokenService : public OAuth2TokenService {
+ public:
+  // Persist the given refresh token on the device.  Overwrites any previous
+  // value.  Should only be called during initial device setup.
+  void SetAndSaveRefreshToken(const std::string& refresh_token);
+
+  static void RegisterPrefs(PrefRegistrySimple* registry);
+
+ protected:
+  virtual std::string GetRefreshToken() OVERRIDE;
+
+ private:
+  friend class DeviceOAuth2TokenServiceFactory;
+  FRIEND_TEST_ALL_PREFIXES(DeviceOAuth2TokenServiceTest, SaveEncryptedToken);
+
+  // Use DeviceOAuth2TokenServiceFactory to get an instance of this class.
+  explicit DeviceOAuth2TokenService(net::URLRequestContextGetter* getter,
+                                    PrefService* local_state);
+  virtual ~DeviceOAuth2TokenService();
+
+  // Cache the decrypted refresh token, so we only decrypt once.
+  std::string refresh_token_;
+  PrefService* local_state_;
+  DISALLOW_COPY_AND_ASSIGN(DeviceOAuth2TokenService);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_OAUTH2_TOKEN_SERVICE_H_