Reland of Removing references to webrtc::PortAllocatorFactoryInterface.

remoting/protocol/port_allocator_factory.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 REMOTING_PROTOCOL_PORT_ALLOCATOR_FACTORY_H_
+#define REMOTING_PROTOCOL_PORT_ALLOCATOR_FACTORY_H_
+
+#include "third_party/webrtc/p2p/base/portallocator.h"
+
+namespace remoting {
+namespace protocol {
+
+// Factory class used for creating cricket::PortAllocator that is used
+// for ICE negotiation.
+class PortAllocatorFactory {
+ public:
+  virtual cricket::PortAllocator* CreatePortAllocator() = 0;
+
+  virtual ~PortAllocatorFactory() {}
+};
+
+}  // namespace protocol
+}  // namespace remoting
+
+#endif  // REMOTING_PROTOCOL_PORT_ALLOCATOR_FACTORY_H_