HostResolver is exposed to plugin.

webkit/plugins/ppapi/ppb_host_resolver_private_impl.cc

+// Copyright (c) 2012 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 "webkit/plugins/ppapi/ppb_host_resolver_private_impl.h"
+
+#include "webkit/plugins/ppapi/host_globals.h"
+#include "webkit/plugins/ppapi/plugin_delegate.h"
+#include "webkit/plugins/ppapi/resource_helper.h"
+
+namespace webkit {
+namespace ppapi {
+
+PPB_HostResolver_Private_Impl::PPB_HostResolver_Private_Impl(
+    PP_Instance instance)
+    : ::ppapi::PPB_HostResolver_Shared(instance) {
+  PluginDelegate* plugin_delegate = ResourceHelper::GetPluginDelegate(this);
+  if (plugin_delegate)
+    plugin_delegate->RegisterHostResolver(this, host_resolver_id_);
+}
+
+PPB_HostResolver_Private_Impl::~PPB_HostResolver_Private_Impl() {
+  PluginDelegate* plugin_delegate = ResourceHelper::GetPluginDelegate(this);
+  if (plugin_delegate)
+    plugin_delegate->UnregisterHostResolver(host_resolver_id_);
+}
+
+void PPB_HostResolver_Private_Impl::SendResolve(
+    const ::ppapi::HostPortPair& host_port,
+    const PP_HostResolver_Private_Hint* hint) {
+  PluginDelegate* plugin_delegate = ResourceHelper::GetPluginDelegate(this);
+  if (!plugin_delegate)
+    return;
+  plugin_delegate->HostResolverResolve(host_resolver_id_, host_port, hint);
+}
+
+}  // namespace ppapi
+}  // namespace webkit