Add support for ProxyResolverErrorObserver to ProxyResolverMojo.

net/proxy/mojo_proxy_resolver_factory_impl.h

 // 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.
 
 #ifndef NET_PROXY_MOJO_PROXY_RESOLVER_FACTORY_IMPL_H_
 #define NET_PROXY_MOJO_PROXY_RESOLVER_FACTORY_IMPL_H_
 
 #include "base/callback.h"
 #include "net/interfaces/proxy_resolver_service.mojom.h"
 #include "net/proxy/proxy_resolver.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
 
 namespace net {
 class HostResolver;
+class ProxyResolverErrorObserver;
 
 class MojoProxyResolverFactoryImpl : public interfaces::ProxyResolverFactory {
  public:
   using Factory = base::Callback<scoped_ptr<ProxyResolver>(
       HostResolver*,
+      scoped_ptr<ProxyResolverErrorObserver>,
       const ProxyResolver::LoadStateChangedCallback&)>;
 
   explicit MojoProxyResolverFactoryImpl(
       mojo::InterfaceRequest<interfaces::ProxyResolverFactory> request);
   MojoProxyResolverFactoryImpl(
       const Factory& proxy_resolver_factory,
       mojo::InterfaceRequest<interfaces::ProxyResolverFactory> request);
 
   ~MojoProxyResolverFactoryImpl() override;
 
  private:
   // interfaces::ProxyResolverFactory override.
-  void CreateResolver(mojo::InterfaceRequest<interfaces::ProxyResolver> request,
-                      interfaces::HostResolverPtr host_resolver) override;
+  void CreateResolver(
+      mojo::InterfaceRequest<interfaces::ProxyResolver> request,
+      interfaces::HostResolverPtr host_resolver,
+      interfaces::ProxyResolverErrorObserverPtr error_observer) override;
 
   const Factory proxy_resolver_impl_factory_;
   mojo::StrongBinding<interfaces::ProxyResolverFactory> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoProxyResolverFactoryImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_MOJO_PROXY_RESOLVER_FACTORY_IMPL_H_