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 d3a56bb783302191b4a22fefaace700cc2c3a9e6..4326de31e0f51fcff0af3012ece5c76a1e2b6d67 100644
--- a/chrome/browser/net/utility_process_mojo_proxy_resolver_factory.cc
+++ b/chrome/browser/net/utility_process_mojo_proxy_resolver_factory.cc
@@ -62,6 +62,7 @@ UtilityProcessMojoProxyResolverFactory::CreateResolver(
     const mojo::String& pac_script,
     mojo::InterfaceRequest<net::interfaces::ProxyResolver> req,
     net::interfaces::HostResolverPtr host_resolver,
+    net::interfaces::ProxyResolverErrorObserverPtr error_observer,
     net::interfaces::ProxyResolverFactoryRequestClientPtr client) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (!resolver_factory_)
@@ -76,7 +77,8 @@ UtilityProcessMojoProxyResolverFactory::CreateResolver(
   idle_timer_.Stop();
   num_proxy_resolvers_++;
   resolver_factory_->CreateResolver(pac_script, req.Pass(),
-                                    host_resolver.Pass(), client.Pass());
+                                    host_resolver.Pass(), error_observer.Pass(),
+                                    client.Pass());
   return make_scoped_ptr(new base::ScopedClosureRunner(
       base::Bind(&UtilityProcessMojoProxyResolverFactory::OnResolverDestroyed,
                  base::Unretained(this))));