Add LoadState reporting to the mojo proxy resolver.

net/proxy/mojo_proxy_resolver_factory_impl.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 "net/proxy/mojo_proxy_resolver_factory_impl.h"
 
 #include "net/dns/host_resolver_mojo.h"
 #include "net/proxy/mojo_proxy_resolver_impl.h"
 #include "net/proxy/proxy_resolver_v8.h"
 #include "net/proxy/proxy_resolver_v8_tracing.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/error_handler.h"
 
 namespace net {
 namespace {
 
 scoped_ptr<ProxyResolver> CreateDefaultProxyResolver(
-    HostResolver* host_resolver) {
+    HostResolver* host_resolver,
+    const ProxyResolver::LoadStateChangedCallback& callback) {
   return make_scoped_ptr(
-      new ProxyResolverV8Tracing(host_resolver, nullptr, nullptr));
+      new ProxyResolverV8Tracing(host_resolver, nullptr, nullptr, callback));
 }
 
 // A class to manage the lifetime of a MojoProxyResolverImpl and a
 // HostResolverMojo. An instance will remain while the message pipes for both
 // mojo connections remain open.
 class MojoProxyResolverHolder : public mojo::ErrorHandler {
  public:
   MojoProxyResolverHolder(
       const MojoProxyResolverFactoryImpl::Factory& proxy_resolver_factory,
       mojo::InterfaceRequest<interfaces::ProxyResolver> request,
       interfaces::HostResolverPtr host_resolver);
 
  private:
   // mojo::ErrorHandler override.
   void OnConnectionError() override;
 
+  void LoadStateChanged(ProxyResolver::RequestHandle handle,
+                        LoadState load_state);
+
   HostResolverMojo host_resolver_;
   MojoProxyResolverImpl proxy_resolver_;
   mojo::Binding<interfaces::ProxyResolver> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoProxyResolverHolder);
 };
 
 MojoProxyResolverHolder::MojoProxyResolverHolder(
     const MojoProxyResolverFactoryImpl::Factory& proxy_resolver_factory,
     mojo::InterfaceRequest<interfaces::ProxyResolver> request,
     interfaces::HostResolverPtr host_resolver)
     : host_resolver_(host_resolver.Pass(),
                      base::Bind(&MojoProxyResolverHolder::OnConnectionError,
                                 base::Unretained(this))),
-      proxy_resolver_(proxy_resolver_factory.Run(&host_resolver_)),
+      proxy_resolver_(proxy_resolver_factory.Run(
+          &host_resolver_,
+          base::Bind(&MojoProxyResolverHolder::LoadStateChanged,
+                     base::Unretained(this)))),
       binding_(&proxy_resolver_, request.Pass()) {
   binding_.set_error_handler(this);
 }
 
 void MojoProxyResolverHolder::OnConnectionError() {
   delete this;
 }
 
+void MojoProxyResolverHolder::LoadStateChanged(
+    ProxyResolver::RequestHandle handle,
+    LoadState load_state) {
+  proxy_resolver_.LoadStateChanged(handle, load_state);
+}
+
 }  // namespace
 
 MojoProxyResolverFactoryImpl::MojoProxyResolverFactoryImpl(
     const MojoProxyResolverFactoryImpl::Factory& proxy_resolver_factory,
     mojo::InterfaceRequest<interfaces::ProxyResolverFactory> request)
     : proxy_resolver_impl_factory_(proxy_resolver_factory),
       binding_(this, request.Pass()) {
 }
 
 MojoProxyResolverFactoryImpl::MojoProxyResolverFactoryImpl(
     mojo::InterfaceRequest<interfaces::ProxyResolverFactory> request)
     : MojoProxyResolverFactoryImpl(base::Bind(&CreateDefaultProxyResolver),
                                    request.Pass()) {
 }
 
 MojoProxyResolverFactoryImpl::~MojoProxyResolverFactoryImpl() = default;
 
 void MojoProxyResolverFactoryImpl::CreateResolver(
     mojo::InterfaceRequest<interfaces::ProxyResolver> request,
     interfaces::HostResolverPtr host_resolver) {
   // The MojoProxyResolverHolder will delete itself when either |request| or
   // |host_resolver| encounters a connection error, that is, when either the
   // ProxyResolver client or the HostResolver implementation is deleted.
   new MojoProxyResolverHolder(proxy_resolver_impl_factory_, request.Pass(),
                               host_resolver.Pass());
 }
 
 }  // namespace net