Port parts of //third_pary/libjingle build to GN

chrome/service/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 
 static_library("service") {
   sources = [
     "cloud_print/cdd_conversion_win.cc",
     "cloud_print/cdd_conversion_win.h",
@@ skipping 41 matching lines @@
     "//chrome:strings",
     "//chrome/common",
     "//chrome/common/net",
     "//base",
     "//components/cloud_devices/common",
     "//google_apis",
     "//jingle:notifier",
     "//net",
     "//printing",
     "//skia",
-    #'../third_party/libjingle/libjingle.gyp:libjingle',  TODO(GYP)
+    "//third_party/libjingle"
   ]
 
   if (use_cups) {
     sources += [ "cloud_print/print_system_cups.cc" ]
     configs += [ "//printing:cups" ]
   } else if (!is_win) {
     sources += [ "cloud_print/print_system_dummp.cc" ]
   }
 }