Use new callbacks in the IqRequest interface.

remoting/host/register_support_host_request.cc

Index: remoting/host/register_support_host_request.cc
diff --git a/remoting/host/register_support_host_request.cc b/remoting/host/register_support_host_request.cc
index 00045f06f6d2ce978c74eaaf0416c2ec0c5467c9..3c47daba239a0001c85632c04b9597be433fa078 100644
--- a/remoting/host/register_support_host_request.cc
+++ b/remoting/host/register_support_host_request.cc
@@ -4,6 +4,7 @@
 
 #include "remoting/host/register_support_host_request.h"
 
+#include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/string_number_conversions.h"
@@ -59,8 +60,8 @@ void RegisterSupportHostRequest::OnSignallingConnected(
   message_loop_ = MessageLoop::current();
 
   request_.reset(signal_strategy->CreateIqRequest());
-  request_->set_callback(NewCallback(
-      this, &RegisterSupportHostRequest::ProcessResponse));
+  request_->set_callback(base::Bind(
+      &RegisterSupportHostRequest::ProcessResponse, base::Unretained(this)));
 
   request_->SendIq(buzz::STR_SET, kChromotingBotJid,
                    CreateRegistrationRequest(jid));