Update some callers to use more direct ways of constructing IPAddress from well known literals.

net/quic/p2p/quic_p2p_session_test.cc

Index: net/quic/p2p/quic_p2p_session_test.cc
diff --git a/net/quic/p2p/quic_p2p_session_test.cc b/net/quic/p2p/quic_p2p_session_test.cc
index 6df1dd1d8762bace90d9dba1fdc563165424f478..fb9cfff1bec37e1447302f3f57bc8cf7ef6f13f4 100644
--- a/net/quic/p2p/quic_p2p_session_test.cc
+++ b/net/quic/p2p/quic_p2p_session_test.cc
@@ -229,7 +229,7 @@ class QuicP2PSessionTest : public ::testing::Test {
     QuicChromiumPacketWriter* writer =
         new QuicChromiumPacketWriter(socket.get());
     scoped_ptr<QuicConnection> quic_connection1(new QuicConnection(
-        0, IPEndPoint(IPAddress(0, 0, 0, 0), 0), &quic_helper_, writer,
+        0, IPEndPoint(IPAddress::IPv4AllZeros(), 0), &quic_helper_, writer,
         true /* owns_writer */, perspective, QuicSupportedVersions()));
     writer->SetConnection(quic_connection1.get());