Add support for ProxyResolverErrorObserver to ProxyResolverMojo.

chrome/browser/net/utility_process_mojo_proxy_resolver_factory.cc

 // Copyright 2015 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 "chrome/browser/net/utility_process_mojo_proxy_resolver_factory.h"
 
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/utility_process_host.h"
@@ skipping 32 matching lines @@
         utility_process_host->GetServiceRegistry();
     service_registry->ConnectToRemoteService(&resolver_factory_);
     resolver_factory_.set_error_handler(this);
   } else {
     LOG(ERROR) << "Unable to connect to utility process";
   }
 }
 
 void UtilityProcessMojoProxyResolverFactory::Create(
     mojo::InterfaceRequest<net::interfaces::ProxyResolver> req,
-    net::interfaces::HostResolverPtr host_resolver) {
+    net::interfaces::HostResolverPtr host_resolver,
+    net::interfaces::ProxyResolverErrorObserverPtr error_observer) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   if (!resolver_factory_)
     CreateProcessAndConnect();
 
   if (!resolver_factory_) {
     // If there's still no factory, then utility process creation failed so
     // close |req|'s message pipe, which should cause a connection error.
     req = nullptr;
     return;
   }
-  resolver_factory_->CreateResolver(req.Pass(), host_resolver.Pass());
+  resolver_factory_->CreateResolver(req.Pass(), host_resolver.Pass(),
+                                    error_observer.Pass());
 }
 
 void UtilityProcessMojoProxyResolverFactory::OnConnectionError() {
   DVLOG(1) << "Disconnection from utility process detected";
   resolver_factory_.reset();
 }