Added WriteResult::WriteResult method for internal use.

net/quic/quic_protocol.cc

Index: net/quic/quic_protocol.cc
diff --git a/net/quic/quic_protocol.cc b/net/quic/quic_protocol.cc
index 82482979bc26f9687c5c196c9ff2a07739ea88d8..5a59809ee4c14ac095e972b4a7bf1e4d4c16fe0d 100644
--- a/net/quic/quic_protocol.cc
+++ b/net/quic/quic_protocol.cc
@@ -722,6 +722,11 @@ ostream& operator<<(ostream& os, const QuicConsumedData& s) {
   return os;
 }
 
+WriteResult::WriteResult()
+    : status(WRITE_STATUS_ERROR),
+      bytes_written(0) {
+}
+
 WriteResult::WriteResult(WriteStatus status,
                          int bytes_written_or_error_code)
     : status(status),