Remove third_party/libjingle and update GN targets.

remoting/test/BUILD.gn

 # Copyright 2015 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("//remoting/remoting_options.gni")
 
 static_library("test_support") {
   testonly = true
 
   sources = [
@@ skipping 68 matching lines @@
     "//remoting/signaling",
     "//third_party/webrtc/modules/desktop_capture",
     "//ui/gfx",
   ]
 
   deps = [
     "//google_apis",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
-    "//third_party/libjingle",
+    "//third_party/webrtc_overrides",
   ]
 }
 
 executable("chromoting_test_driver") {
   testonly = true
 
   sources = [
     "chromoting_test_driver.cc",
     "chromoting_test_driver_tests.cc",
     "chromoting_test_fixture.cc",
@@ skipping 129 matching lines @@
     ":ar_test_driver_common",
     ":test_support",
     "//base",
     "//net:test_support",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/libyuv",
     "//third_party/webrtc/modules/desktop_capture",
   ]
 }