Migrate callers of message_loop_proxy() to task_runner()

cloud_print/gcp20/prototype/printer.cc

 // Copyright 2013 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.
 
 #include "cloud_print/gcp20/prototype/printer.h"
 
 #include <limits.h>
 #include <stdio.h>
 #include <algorithm>
 #include <string>
@@ skipping 122 matching lines @@
 
 std::string GetDescription() {
   std::string result = kPrinterDescription;
   net::IPAddressNumber ip = GetLocalIp("", false);
   if (!ip.empty())
     result += " at " + net::IPAddressToString(ip);
   return result;
 }
 
 scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() {
-  return base::MessageLoop::current()->message_loop_proxy();
+  return base::MessageLoop::current()->task_runner();
 }
 
 }  // namespace
 
 using cloud_print_response_parser::Job;
 
 Printer::Printer()
     : connection_state_(OFFLINE),
       http_server_(this),
       on_idle_posted_(false),
@@ skipping 802 matching lines @@
 
   dns_server_.UpdateMetadata(CreateTxt());
 
   if (connection_state_ == OFFLINE) {
     requester_.reset();
     xmpp_listener_.reset();
   }
 
   return true;
 }