Adds clearer function to create rtc::Thread without Physical SocketServer

webrtc/base/physicalsocketserver.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #include "webrtc/base/physicalsocketserver.h"
@@ skipping 28 matching lines @@
 
 #include <algorithm>
 #include <map>
 
 #include "webrtc/base/arraysize.h"
 #include "webrtc/base/basictypes.h"
 #include "webrtc/base/byteorder.h"
 #include "webrtc/base/common.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/networkmonitor.h"
+#include "webrtc/base/nullsocketserver.h"
 #include "webrtc/base/timeutils.h"
 #include "webrtc/base/winping.h"
 #include "webrtc/base/win32socketinit.h"
 
 #if defined(WEBRTC_POSIX)
 #include <netinet/tcp.h>  // for TCP_NODELAY
 #define IP_MTU 14 // Until this is integrated from linux/in.h to netinet/in.h
 typedef void* SockOptArg;
 #endif  // WEBRTC_POSIX
 
 #if defined(WEBRTC_WIN)
 typedef char* SockOptArg;
 #endif
 
 namespace rtc {
 
+std::unique_ptr<SocketServer> SocketServer::CreateDefault() {
+#if defined(__native_client__)
+  return std::unique_ptr<SocketServer>(new rtc::NullSocketServer);
+#else
+  return std::unique_ptr<SocketServer>(new rtc::PhysicalSocketServer);
+#endif
+}
+
 #if defined(WEBRTC_WIN)
 // Standard MTUs, from RFC 1191
 const uint16_t PACKET_MAXIMUMS[] = {
     65535,  // Theoretical maximum, Hyperchannel
     32000,  // Nothing
     17914,  // 16Mb IBM Token Ring
     8166,   // IEEE 802.4
     // 4464,   // IEEE 802.5 (4Mb max)
     4352,   // FDDI
     // 2048,   // Wideband Network
@@ skipping 1543 matching lines @@
        break;
     }
   }
 
   // Done
   return true;
 }
 #endif  // WEBRTC_WIN
 
 }  // namespace rtc