Add support for ProxyResolverErrorObserver to ProxyResolverMojo.

chrome/browser/net/utility_process_mojo_proxy_resolver_factory.cc

Index: chrome/browser/net/utility_process_mojo_proxy_resolver_factory.cc
diff --git a/chrome/browser/net/utility_process_mojo_proxy_resolver_factory.cc b/chrome/browser/net/utility_process_mojo_proxy_resolver_factory.cc
index 501d44a9ca7384fd3d482b1caf5544cd4371c481..0b56a3a7cf507a936780e7a078327504dabcbe75 100644
--- a/chrome/browser/net/utility_process_mojo_proxy_resolver_factory.cc
+++ b/chrome/browser/net/utility_process_mojo_proxy_resolver_factory.cc
@@ -50,7 +50,8 @@ void UtilityProcessMojoProxyResolverFactory::CreateProcessAndConnect() {
 
 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();
@@ -61,7 +62,8 @@ void UtilityProcessMojoProxyResolverFactory::Create(
     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() {