Update to use third_party/webrtc_overrides instead of third_party/webrtc/overrides.

third_party/libjingle/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/crypto.gni")
 import("//build/config/features.gni")
 
 # From third_party/libjingle/libjingle.gyp's target_defaults.
 config("jingle_unexported_configs") {
   defines = [
     "EXPAT_RELATIVE_PATH",
     "FEATURE_ENABLE_SSL",
     "GTEST_RELATIVE_PATH",
     "HAVE_OPENSSL_SSL_H",
     "HAVE_SRTP",
     "HAVE_WEBRTC_VIDEO",
     "HAVE_WEBRTC_VOICE",
     "LOGGING_INSIDE_WEBRTC",
     "NO_MAIN_THREAD_WRAPPING",
     "NO_SOUND_SYSTEM",
     "SRTP_RELATIVE_PATH",
     "SSL_USE_OPENSSL",
     "USE_WEBRTC_DEV_BRANCH",
     "ENABLE_EXTERNAL_AUTH",
     "WEBRTC_CHROMIUM_BUILD",
   ]
 
   include_dirs = [
     "overrides",
-    "../../third_party/webrtc/overrides",
+    "../../third_party/webrtc_overrides",
     "source",
     "../../testing/gtest/include",
     "../../third_party",
     "../../third_party/libyuv/include",
     "../../third_party/usrsctp",
   ]
 
   # Assumes libpeer is linked statically.
   defines += [ "LIBPEERCONNECTION_LIB=1" ]
 
   if (is_win && current_cpu == "x86") {
     defines += [ "_USE_32BIT_TIME_T" ]
   }
 }
 
 # From third_party/libjingle/libjingle.gyp's target_defaults.
 config("jingle_public_configs") {
   include_dirs = [
-    "../../third_party/webrtc/overrides",
+    "../../third_party/webrtc_overrides",
     "overrides",
     "source",
     "../../testing/gtest/include",
     "../../third_party",
   ]
   defines = [
     "FEATURE_ENABLE_SSL",
     "FEATURE_ENABLE_VOICEMAIL",
     "EXPAT_RELATIVE_PATH",
     "GTEST_RELATIVE_PATH",
@@ skipping 443 matching lines @@
       "$p2p_dir/stunprober/stunprober.cc",
     ]
 
     deps = [
       "//third_party/webrtc/base:rtc_base",
       ":libjingle_webrtc_common",
     ]
   }
 }  # enable_webrtc
 # TODO(GYP): Port libjingle.gyp's enable_webrtc condition block.