Remove VirtualSocketServer's dependency on PhysicalSocketServer.

webrtc/p2p/base/udptransport_unittest.cc

Index: webrtc/p2p/base/udptransport_unittest.cc
diff --git a/webrtc/p2p/base/udptransport_unittest.cc b/webrtc/p2p/base/udptransport_unittest.cc
index 5c4f265a7ff01f7183941788fe18415b84ed7b44..f9db024afea6391feaac1090c3c83cefd9005c1f 100644
--- a/webrtc/p2p/base/udptransport_unittest.cc
+++ b/webrtc/p2p/base/udptransport_unittest.cc
@@ -18,7 +18,6 @@
 #include "webrtc/base/thread.h"
 #include "webrtc/base/asyncpacketsocket.h"
 #include "webrtc/base/ipaddress.h"
-#include "webrtc/base/physicalsocketserver.h"
 #include "webrtc/base/socketaddress.h"
 #include "webrtc/base/socketserver.h"
 #include "webrtc/base/virtualsocketserver.h"
@@ -35,9 +34,7 @@ static const rtc::IPAddress kIPv4LocalHostAddress =
 class UdpTransportTest : public testing::Test, public sigslot::has_slots<> {
  public:
   UdpTransportTest()
-      : physical_socket_server_(new rtc::PhysicalSocketServer),
-        virtual_socket_server_(
-            new rtc::VirtualSocketServer(physical_socket_server_.get())),
+      : virtual_socket_server_(new rtc::VirtualSocketServer()),
         network_thread_(virtual_socket_server_.get()),
         ep1_("Name1",
              std::unique_ptr<rtc::AsyncPacketSocket>(
@@ -120,7 +117,6 @@ class UdpTransportTest : public testing::Test, public sigslot::has_slots<> {
     uint32_t num_sig_ready_to_send_ = 0;  // Increases on SignalReadyToSend.
   };
 
-  std::unique_ptr<rtc::PhysicalSocketServer> physical_socket_server_;
   std::unique_ptr<rtc::VirtualSocketServer> virtual_socket_server_;
   rtc::AutoSocketServerThread network_thread_;
   // Uses current thread's socket server, which will be set by ss_scope_.