jingle: inline gypi file into BUILD.gn file

jingle/jingle.gypi

Index: jingle/jingle.gypi
diff --git a/jingle/jingle.gypi b/jingle/jingle.gypi
deleted file mode 100644
index 339ef59c625451b2741fd7e4a005a1e0dbf99d51..0000000000000000000000000000000000000000
--- a/jingle/jingle.gypi
+++ /dev/null
@@ -1,25 +0,0 @@
-# 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.
-
-{
-  'variables': {
-    'jingle_glue_sources': [
-      'glue/chrome_async_socket.cc',
-      'glue/chrome_async_socket.h',
-      'glue/fake_ssl_client_socket.cc',
-      'glue/fake_ssl_client_socket.h',
-      'glue/proxy_resolving_client_socket.cc',
-      'glue/proxy_resolving_client_socket.h',
-      'glue/resolving_client_socket_factory.h',
-      'glue/task_pump.cc',
-      'glue/task_pump.h',
-      'glue/thread_wrapper.cc',
-      'glue/thread_wrapper.h',
-      'glue/utils.cc',
-      'glue/utils.h',
-      'glue/xmpp_client_socket_factory.cc',
-      'glue/xmpp_client_socket_factory.h',
-    ]
-  }
-}