Add support for ProxyResolverErrorObserver to ProxyResolverMojo.

chrome/browser/net/utility_process_mojo_proxy_resolver_factory.h

Index: chrome/browser/net/utility_process_mojo_proxy_resolver_factory.h
diff --git a/chrome/browser/net/utility_process_mojo_proxy_resolver_factory.h b/chrome/browser/net/utility_process_mojo_proxy_resolver_factory.h
index 0186253071b9316186fb533496187905426bd74f..1a5959b547cb88a7e86121fa58963dc0da775d07 100644
--- a/chrome/browser/net/utility_process_mojo_proxy_resolver_factory.h
+++ b/chrome/browser/net/utility_process_mojo_proxy_resolver_factory.h
@@ -22,8 +22,10 @@ class UtilityProcessMojoProxyResolverFactory
   static UtilityProcessMojoProxyResolverFactory* GetInstance();
 
   // Overridden from net::MojoProxyResolverFactory:
-  void Create(mojo::InterfaceRequest<net::interfaces::ProxyResolver> req,
-              net::interfaces::HostResolverPtr host_resolver) override;
+  void Create(
+      mojo::InterfaceRequest<net::interfaces::ProxyResolver> req,
+      net::interfaces::HostResolverPtr host_resolver,
+      net::interfaces::ProxyResolverErrorObserverPtr error_observer) override;
 
  private:
   friend struct DefaultSingletonTraits<UtilityProcessMojoProxyResolverFactory>;