Implement HostPortAllocator.

remoting/host/host_port_allocator.h

Index: remoting/host/host_port_allocator.h
diff --git a/remoting/host/host_port_allocator.h b/remoting/host/host_port_allocator.h
new file mode 100644
index 0000000000000000000000000000000000000000..868102fba2d25b5736ab5be0a8e8d00f2f19d245
--- /dev/null
+++ b/remoting/host/host_port_allocator.h
@@ -0,0 +1,55 @@
+// 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.
+
+#ifndef REMOTING_HOST_HOST_PORT_ALLOCATOR_H_
+#define REMOTING_HOST_HOST_PORT_ALLOCATOR_H_
+
+#include <set>
+
+#include "base/memory/scoped_ptr.h"
+#include "remoting/host/url_fetcher.h"
+#include "third_party/libjingle/source/talk/p2p/client/httpportallocator.h"
+
+namespace net {
+class URLRequestContextGetter;
+}  // namespace net
+
+namespace remoting {
+
+struct NetworkSettings;
+
+// An implementation of cricket::PortAllocator for libjingle that is
+// used by the remoting host. The main difference from
+// cricket::HttpPortAllocator is that it uses Chromium's HTTP stack
+// when creating relay sessions. It also configures itself according
+// to the specified NetworkSettings.
+class HostPortAllocator : public cricket::HttpPortAllocatorBase {
+ public:
+  static scoped_ptr<HostPortAllocator> Create(
+      const scoped_refptr<net::URLRequestContextGetter>& url_context,
+      const NetworkSettings& network_settings);
+
+  virtual ~HostPortAllocator();
+
+  // cricket::HttpPortAllocatorBase overrides.
+  virtual cricket::PortAllocatorSession* CreateSession(
+      const std::string& channel_name,
+      int component) OVERRIDE;
+
+ private:
+  HostPortAllocator(
+      const scoped_refptr<net::URLRequestContextGetter>& url_context,
+      scoped_ptr<talk_base::NetworkManager> network_manager,
+      scoped_ptr<talk_base::PacketSocketFactory> socket_factory);
+
+  scoped_refptr<net::URLRequestContextGetter> url_context_;
+  scoped_ptr<talk_base::NetworkManager> network_manager_;
+  scoped_ptr<talk_base::PacketSocketFactory> socket_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(HostPortAllocator);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_HOST_PORT_ALLOCATOR_H_