Remove VirtualSocketServer's dependency on PhysicalSocketServer.

webrtc/ortc/ortcfactory_unittest.cc

Index: webrtc/ortc/ortcfactory_unittest.cc
diff --git a/webrtc/ortc/ortcfactory_unittest.cc b/webrtc/ortc/ortcfactory_unittest.cc
index 84745babf9eddeb54f114e3f6de435c96dc31e75..671cd94466a4ce403cd175f2b1129f66143ebfa6 100644
--- a/webrtc/ortc/ortcfactory_unittest.cc
+++ b/webrtc/ortc/ortcfactory_unittest.cc
@@ -12,7 +12,6 @@
 
 #include "webrtc/base/fakenetwork.h"
 #include "webrtc/base/gunit.h"
-#include "webrtc/base/physicalsocketserver.h"
 #include "webrtc/base/virtualsocketserver.h"
 #include "webrtc/media/base/fakemediaengine.h"
 #include "webrtc/ortc/ortcfactory.h"
@@ -27,8 +26,7 @@ namespace webrtc {
 class OrtcFactoryTest : public testing::Test {
  public:
   OrtcFactoryTest()
-      : virtual_socket_server_(&physical_socket_server_),
-        thread_(&virtual_socket_server_),
+      : thread_(&virtual_socket_server_),
         fake_packet_transport_("fake transport") {
     ortc_factory_ =
         OrtcFactory::Create(nullptr, nullptr, &fake_network_manager_, nullptr,
@@ -49,7 +47,6 @@ class OrtcFactoryTest : public testing::Test {
         .MoveValue();
   }
 
-  rtc::PhysicalSocketServer physical_socket_server_;
   rtc::VirtualSocketServer virtual_socket_server_;
   rtc::AutoSocketServerThread thread_;
   rtc::FakeNetworkManager fake_network_manager_;