Revert 148418 - Always use chromium threads for IO in remoting host

remoting/jingle_glue/xmpp_signal_strategy.h

Index: remoting/jingle_glue/xmpp_signal_strategy.h
===================================================================
--- remoting/jingle_glue/xmpp_signal_strategy.h	(revision 148577)
+++ remoting/jingle_glue/xmpp_signal_strategy.h	(working copy)
@@ -21,14 +21,6 @@
 #include "third_party/libjingle/source/talk/base/sigslot.h"
 #include "third_party/libjingle/source/talk/xmpp/xmppclient.h"
 
-namespace net {
-class URLRequestContextGetter;
-}  // namespace net
-
-namespace talk_base {
-class TaskRunner;
-}  // namespace talk_base
-
 namespace remoting {
 
 class JingleThread;
@@ -38,11 +30,10 @@
                            public buzz::XmppStanzaHandler,
                            public sigslot::has_slots<> {
  public:
-  XmppSignalStrategy(
-      scoped_refptr<net::URLRequestContextGetter> request_context_getter,
-      const std::string& username,
-      const std::string& auth_token,
-      const std::string& auth_token_service);
+  XmppSignalStrategy(JingleThread* thread,
+                     const std::string& username,
+                     const std::string& auth_token,
+                     const std::string& auth_token_service);
   virtual ~XmppSignalStrategy();
 
   // SignalStrategy interface.
@@ -79,12 +70,12 @@
 
   void SendKeepAlive();
 
-  scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
+  JingleThread* thread_;
+
   std::string username_;
   std::string auth_token_;
   std::string auth_token_service_;
   std::string resource_name_;
-  scoped_ptr<talk_base::TaskRunner> task_runner_;
   buzz::XmppClient* xmpp_client_;
 
   State state_;