Remove third_party/libjingle and update GN targets.

remoting/host/it2me/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")
 import("//media/media_options.gni")
 import("//remoting/remoting_options.gni")
 import("//remoting/remoting_locales.gni")
 import("//remoting/remoting_version.gni")
 
@@ skipping 209 matching lines @@
           ":remote_assistance_host_xibs",
           "//remoting/host:remoting_infoplist_strings",
           "//remoting/resources:copy_locales",
         ]
         if (icu_use_data_file) {
           deps += [ ":remote_assistance_host_resources" ]
         }
       }
 
       if (enable_webrtc) {
-        deps += [ "//third_party/libjingle/webrtc:libjingle_webrtc" ]
+        deps += [ "//third_party/webrtc_overrides:init_webrtc" ]
       }
 
       if (is_desktop_linux) {
         deps += [ "//build/config/linux/gtk" ]
       }
     }
   }
 }