Add gn dependency on rtc_task_runner.

third_party/libjingle_xmpp/BUILD.gn

 # Copyright 2016 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.
 
 # TODO(kjellander): Remove remaining dependencies on the WebRTC codebase.
 import("../webrtc/webrtc.gni")
 
 group("libjingle_xmpp") {
   public_deps = [
     ":rtc_xmllite",
@@ skipping 14 matching lines @@
     "xmllite/xmlnsstack.cc",
     "xmllite/xmlnsstack.h",
     "xmllite/xmlparser.cc",
     "xmllite/xmlparser.h",
     "xmllite/xmlprinter.cc",
     "xmllite/xmlprinter.h",
   ]
 
   deps = [
     "//third_party/webrtc/base:rtc_base",
+    "//third_party/webrtc/base:rtc_task_runner",
   ]
   public_deps = [
     "//third_party/expat",
   ]
 }
 
 config("rtc_xmpp_warnings_config") {
   # GN orders flags on a target before flags from configs. The default config
   # adds these flags so to cancel them out they need to come from a config and
   # cannot be on the target directly.
@@ skipping 30 matching lines @@
     "xmpp/xmppstanzaparser.h",
     "xmpp/xmpptask.cc",
     "xmpp/xmpptask.h",
   ]
 
   defines = []
 
   deps = [
     ":rtc_xmllite",
     "//third_party/webrtc/base:rtc_base",
+    "//third_party/webrtc/base:rtc_task_runner",
   ]
   public_deps = [
     "//third_party/expat",
   ]
   configs += [ ":rtc_xmpp_warnings_config" ]
 
   if (is_nacl) {
     deps += [ "//native_client_sdk/src/libraries/nacl_io" ]
   }
 
@@ skipping 40 matching lines @@
     "xmllite/xmlprinter_unittest.cc",
     "xmpp/fakexmppclient.h",
     "xmpp/jid_unittest.cc",
     "xmpp/util_unittest.cc",
     "xmpp/util_unittest.h",
     "xmpp/xmppengine_unittest.cc",
     "xmpp/xmpplogintask_unittest.cc",
     "xmpp/xmppstanzaparser_unittest.cc",
   ]
 }