Port parts of //third_pary/libjingle build to GN

jingle/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")
 
 jingle_includes = exec_script("//build/gypi_to_gn.py",
                               [ rebase_path("jingle.gypi") ],
                               "scope",
                               [ "jingle.gypi" ])
 
 if (enable_webrtc || !is_android) {
   # GYP version: jingle/jingle.gyp:jingle_glue
   static_library("jingle_glue") {
     sources = jingle_includes.jingle_glue_sources
     deps = [
       "//base",
       "//base/third_party/dynamic_annotations",
       "//net",
-      # '../third_party/libjingle/libjingle.gyp:libjingle',  # TODO(GYP)
+      "//third_party/libjingle",
     ]
-    # 'export_dependent_settings': [
-    #   '../third_party/libjingle/libjingle.gyp:libjingle',
-    # ],
-
-    # TODO(GYP): Replace this with a proper dependency on libjingle.
-    direct_dependent_configs = [ "//content:libjingle_stub_config", ]
+    forward_dependent_configs_from = [ "//third_party/libjingle" ]
   }
 
   # A library for sending and receiving peer-issued notifications.
   # GYP version: jingle/jingle.gyp:notifier
   static_library("notifier") {
     sources = [
       "notifier/base/const_communicator.h",
       "notifier/base/gaia_constants.cc",
       "notifier/base/gaia_constants.h",
       "notifier/base/gaia_token_pre_xmpp_auth.cc",
@@ skipping 43 matching lines @@
     ]
     defines = [
      "_CRT_SECURE_NO_WARNINGS",
     ]
     deps = [
       "//base",
       "//net",
       "//third_party/expat",
       "//url",
       ":jingle_glue",
-      # '../third_party/libjingle/libjingle.gyp:libjingle',  # TODO(GYP)
+      "//third_party/libjingle",
     ]
-    # 'export_dependent_settings': [
-    #   '../third_party/libjingle/libjingle.gyp:libjingle',
-    # ],
-    # TODO(GYP): Replace this with a proper dependency on libjingle.
-    direct_dependent_configs = [ "//content:libjingle_stub_config", ]
+    forward_dependent_configs_from = [ "//third_party/libjingle" ]
   }
 
   # GYP version: jingle/jingle.gyp:notifier_test_util
   static_library("notifier_test_util") {
     sources = [
       "notifier/base/fake_base_task.cc",
       "notifier/base/fake_base_task.h",
       "notifier/listener/fake_push_client.cc",
       "notifier/listener/fake_push_client.h",
       "notifier/listener/fake_push_client_observer.cc",
@@ skipping 51 matching lines @@
       ":jingle_glue",
       ":notifier",
       ":notifier_test_util",
       "//base",
       "//base/test:run_all_unittests",
       "//base/test:test_support",
       "//net",
       "//net:test_support",
       "//testing/gmock",
       "//testing/gtest",
-      # '../third_party/libjingle/libjingle.gyp:libjingle',  # TODO(GYP)
+      "//third_party/libjingle",
     ]
-    # 'export_dependent_settings': [
-    #   '../third_party/libjingle/libjingle.gyp:libjingle',
-    # ],
-    # TODO(GYP): Replace this with a proper dependency on libjingle.
-    direct_dependent_configs = [ "//content:libjingle_stub_config", ]
+    forward_dependent_configs_from = [ "//third_party/libjingle" ]
   }
 } else {
   # !enable_webrtc and is_android
   # Stub targets as Android doesn't use libjingle when webrtc is disabled.
   source_set("jingle_glue") { }
 
   source_set("jingle_glue_test_util") { }
 
   # GYP version: jingle/jingle.gyp:notifier
   static_library("notifier") {
     sources = [
       "notifier/base/gaia_constants.cc",
       "notifier/base/gaia_constants.h",
       "notifier/base/notification_method.h",
       "notifier/base/notification_method.cc",
       "notifier/base/notifier_options.cc",
       "notifier/base/notifier_options.h",
     ]
     deps = [
       "//base",
       "//net"
     ]
   }
 
   source_set("notifier_test_util") { }
 }