Add IssueAuthToken support to the TokenService.

chrome/common/net/gaia/gaia_constants.cc

+// Copyright (c) 2010 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.
+//
+// Constants definitions
+
+#include "chrome/common/net/gaia/gaia_constants.h"
+
+namespace GaiaConstants {
+
+// Gaia uses this for accounting where login is coming from.
+const char kChromeOSSource[] = "chromeos";
+const char kChromeSource[] = "ChromiumBrowser";
+
+// Service name for Gaia Contacts API. API is used to get user's image.
+const char kContactsService[] = "cp";
+// Service name for sync.
+const char kSyncService[] = "chromiumsync";
+// Service name for XMPP Google Talk.
+const char kTalkService[] = "talk";
+
+}  // namespace GaiaConstants