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

chrome/browser/chromeos/settings/device_oauth2_token_service_factory.cc

+// Copyright (c) 2012 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_factory.h"
+
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/chromeos/settings/device_oauth2_token_service.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace chromeos {
+
+static DeviceOAuth2TokenService* g_device_oauth2_token_service_ = NULL;
+
+DeviceOAuth2TokenServiceFactory::DeviceOAuth2TokenServiceFactory() {
+}
+
+// static
+DeviceOAuth2TokenService* DeviceOAuth2TokenServiceFactory::Get() {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  return g_device_oauth2_token_service_;
+}
+
+// static
+void DeviceOAuth2TokenServiceFactory::Initialize() {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  DCHECK(!g_device_oauth2_token_service_);
+  g_device_oauth2_token_service_ = new DeviceOAuth2TokenService(
+      g_browser_process->system_request_context(),
+      g_browser_process->local_state());
+}
+
+// static
+void DeviceOAuth2TokenServiceFactory::Shutdown() {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  if (g_device_oauth2_token_service_) {
+    delete g_device_oauth2_token_service_;
+    g_device_oauth2_token_service_ = NULL;
+  }
+}
+
+}  // namespace chromeos