Teach gtest how to print QuicConsumedData and QuicEncryptedPacket.

net/quic/quic_protocol.cc

Index: net/quic/quic_protocol.cc
===================================================================
--- net/quic/quic_protocol.cc	(revision 177746)
+++ net/quic/quic_protocol.cc	(working copy)
@@ -79,7 +79,7 @@
 }
 
 ostream& operator<<(ostream& os, const SentPacketInfo& sent_info) {
-  os << "least_waiting: " << sent_info.least_unacked;
+  os << "least_unacked: " << sent_info.least_unacked;
   return os;
 }
 
@@ -169,4 +169,15 @@
   }
 }
 
+ostream& operator<<(ostream& os, const QuicEncryptedPacket& s) {
+  os << s.length() << "-byte data";
+  return os;
+}
+
+ostream& operator<<(ostream& os, const QuicConsumedData& s) {
+  os << "bytes_consumed: " << s.bytes_consumed
+     << " fin_consumed: " << s.fin_consumed;
+  return os;
+}
+
 }  // namespace net