Implement utility-side proxy resolver factory Mojo service.

net/proxy/mojo_proxy_resolver_factory.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.h"
+
+#include "net/dns/host_resolver_mojo.h"
+#include "net/proxy/mojo_proxy_resolver_impl.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) {
+  return make_scoped_ptr(
+      new ProxyResolverV8Tracing(host_resolver, nullptr, nullptr));
+}
+
+class MojoProxyResolverHolder : public mojo::ErrorHandler {

[Anand Mistry (off Chromium), 2015/02/16 06:46:15]

Please comment on the life span of this. It's not immediately clear that this is
bound to the life of the ProxyResolver's message pipe.

[Sam McNally, 2015/02/17 00:00:57]

Done.

+ public:
+  MojoProxyResolverHolder(
+      const MojoProxyResolverFactory::Factory& proxy_resolver_factory,
+      mojo::InterfaceRequest<interfaces::ProxyResolver> request,
+      interfaces::HostResolverPtr host_resolver);
+
+ private:
+  // mojo::ErrorHandler override.
+  void OnConnectionError() override;
+
+  HostResolverMojo host_resolver_;
+  MojoProxyResolverImpl proxy_resolver_;
+  mojo::Binding<interfaces::ProxyResolver> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(MojoProxyResolverHolder);
+};
+
+MojoProxyResolverHolder::MojoProxyResolverHolder(
+    const MojoProxyResolverFactory::Factory& proxy_resolver_factory,
+    mojo::InterfaceRequest<interfaces::ProxyResolver> request,
+    interfaces::HostResolverPtr host_resolver)
+    : host_resolver_(host_resolver.Pass(), this),
+      proxy_resolver_(proxy_resolver_factory.Run(&host_resolver_)),
+      binding_(&proxy_resolver_, request.Pass()) {
+  binding_.set_error_handler(this);
+}
+
+void MojoProxyResolverHolder::OnConnectionError() {
+  delete this;
+}
+
+}  // namespace
+
+MojoProxyResolverFactory::MojoProxyResolverFactory(
+    const MojoProxyResolverFactory::Factory& proxy_resolver_factory,
+    mojo::InterfaceRequest<interfaces::ProxyResolverFactory> request)
+    : proxy_resolver_impl_factory_(proxy_resolver_factory),
+      binding_(this, request.Pass()) {
+}
+
+MojoProxyResolverFactory::MojoProxyResolverFactory(
+    mojo::InterfaceRequest<interfaces::ProxyResolverFactory> request)
+    : MojoProxyResolverFactory(base::Bind(&CreateDefaultProxyResolver),
+                               request.Pass()) {
+}
+
+MojoProxyResolverFactory::~MojoProxyResolverFactory() = default;
+
+void MojoProxyResolverFactory::CreateResolver(
+    mojo::InterfaceRequest<interfaces::ProxyResolver> request,
+    interfaces::HostResolverPtr host_resolver) {
+  new MojoProxyResolverHolder(proxy_resolver_impl_factory_, request.Pass(),
+                              host_resolver.Pass());
+}
+
+}  // namespace net