Improve debug logging of QUIC crypto handshake.

net/quic/quic_crypto_stream.cc

Index: net/quic/quic_crypto_stream.cc
diff --git a/net/quic/quic_crypto_stream.cc b/net/quic/quic_crypto_stream.cc
index 36b7c4550a28107895145d5e59837ccf0dfffbdd..31de659ba7b34219df1691036da2686bfff976bb 100644
--- a/net/quic/quic_crypto_stream.cc
+++ b/net/quic/quic_crypto_stream.cc
@@ -17,10 +17,13 @@ using base::StringPiece;
 
 namespace net {
 
+#define ENDPOINT (is_server_ ? "Server: " : " Client: ")
+
 QuicCryptoStream::QuicCryptoStream(QuicSession* session)
     : ReliableQuicStream(kCryptoStreamId, session),
       encryption_established_(false),
-      handshake_confirmed_(false) {
+      handshake_confirmed_(false),
+      is_server_(session->is_server()) {
   crypto_framer_.set_visitor(this);
   if (version() <= QUIC_VERSION_20) {
     // Prior to QUIC_VERSION_21 the crypto stream is not subject to any flow
@@ -38,6 +41,7 @@ void QuicCryptoStream::OnError(CryptoFramer* framer) {
 
 void QuicCryptoStream::OnHandshakeMessage(
     const CryptoHandshakeMessage& message) {
+  DVLOG(1) << ENDPOINT << "Received " << message.DebugString();
   session()->OnCryptoHandshakeMessageReceived(message);
 }
 
@@ -56,6 +60,7 @@ QuicPriority QuicCryptoStream::EffectivePriority() const {
 
 void QuicCryptoStream::SendHandshakeMessage(
     const CryptoHandshakeMessage& message) {
+  DVLOG(1) << ENDPOINT << "Sending " << message.DebugString();
   session()->OnCryptoHandshakeMessageSent(message);
   const QuicData& data = message.GetSerialized();
   // TODO(wtc): check the return value.