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

chrome/browser/chromeos/settings/device_oauth2_token_service.cc

+// 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.
+
+#include "chrome/browser/chromeos/settings/device_oauth2_token_service.h"
+
+#include "base/prefs/pref_registry_simple.h"
+#include "base/prefs/pref_service.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/chromeos/cros/cert_library.h"
+#include "chrome/browser/chromeos/cros/cros_library.h"
+#include "chrome/common/pref_names.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace chromeos {
+
+DeviceOAuth2TokenService::DeviceOAuth2TokenService(
+    net::URLRequestContextGetter* getter,
+    PrefService* local_state)
+    : OAuth2TokenService(getter),
+      local_state_(local_state) {
+}
+
+DeviceOAuth2TokenService::~DeviceOAuth2TokenService() {
+}
+
+// static
+void DeviceOAuth2TokenService::RegisterPrefs(PrefRegistrySimple* registry) {
+  registry->RegisterStringPref(prefs::kDeviceRobotAnyApiRefreshToken,
+                               std::string());
+}
+
+void DeviceOAuth2TokenService::SetAndSaveRefreshToken(
+    const std::string& refresh_token) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  std::string encrypted_refresh_token =
+      CrosLibrary::Get()->GetCertLibrary()->EncryptWithSystemSalt(
+          refresh_token);
+
+  local_state_->SetString(prefs::kDeviceRobotAnyApiRefreshToken,
+                          encrypted_refresh_token);
+}
+
+std::string DeviceOAuth2TokenService::GetRefreshToken() {
+  if (refresh_token_.empty()) {
+    std::string encrypted_refresh_token =
+        local_state_->GetString(prefs::kDeviceRobotAnyApiRefreshToken);
+
+    refresh_token_ =
+        CrosLibrary::Get()->GetCertLibrary()->DecryptWithSystemSalt(
+            encrypted_refresh_token);
+  }
+  return refresh_token_;
+}
+
+}  // namespace chromeos