Make Port (and subclasses) fully "Network"-based, instead of IP-based.

webrtc/p2p/base/fakeportallocator.h

Index: webrtc/p2p/base/fakeportallocator.h
diff --git a/webrtc/p2p/base/fakeportallocator.h b/webrtc/p2p/base/fakeportallocator.h
index 7bf7f969bb8017617a6ebf84f06dbf24f08f1425..d7c30f0a6e5f7f1ef8fe7e9c3dfe3b5f48f1f00f 100644
--- a/webrtc/p2p/base/fakeportallocator.h
+++ b/webrtc/p2p/base/fakeportallocator.h
@@ -32,16 +32,15 @@ class TestUDPPort : public UDPPort {
   static TestUDPPort* Create(rtc::Thread* thread,
                              rtc::PacketSocketFactory* factory,
                              rtc::Network* network,
-                             const rtc::IPAddress& ip,
                              uint16_t min_port,
                              uint16_t max_port,
                              const std::string& username,
                              const std::string& password,
                              const std::string& origin,
                              bool emit_localhost_for_anyaddress) {
-    TestUDPPort* port = new TestUDPPort(thread, factory, network, ip, min_port,
-                                        max_port, username, password, origin,
-                                        emit_localhost_for_anyaddress);
+    TestUDPPort* port =
+        new TestUDPPort(thread, factory, network, min_port, max_port, username,
+                        password, origin, emit_localhost_for_anyaddress);
     if (!port->Init()) {
       delete port;
       port = nullptr;
@@ -62,7 +61,6 @@ class TestUDPPort : public UDPPort {
   TestUDPPort(rtc::Thread* thread,
               rtc::PacketSocketFactory* factory,
               rtc::Network* network,
-              const rtc::IPAddress& ip,
               uint16_t min_port,
               uint16_t max_port,
               const std::string& username,
@@ -72,7 +70,6 @@ class TestUDPPort : public UDPPort {
       : UDPPort(thread,
                 factory,
                 network,
-                ip,
                 min_port,
                 max_port,
                 username,
@@ -128,9 +125,9 @@ class FakePortAllocatorSession : public PortAllocatorSession {
           (rtc::HasIPv6Enabled() && (flags() & PORTALLOCATOR_ENABLE_IPV6))
               ? ipv6_network_
               : ipv4_network_;
-      port_.reset(TestUDPPort::Create(network_thread_, factory_, &network,
-                                      network.GetBestIP(), 0, 0, username(),
-                                      password(), std::string(), false));
+      port_.reset(TestUDPPort::Create(network_thread_, factory_, &network, 0, 0,
+                                      username(), password(), std::string(),
+                                      false));
       port_->SignalDestroyed.connect(
           this, &FakePortAllocatorSession::OnPortDestroyed);
       AddPort(port_.get());