Add quic_map_util.

net/quic/core/crypto/crypto_handshake_message.cc

Index: net/quic/core/crypto/crypto_handshake_message.cc
diff --git a/net/quic/core/crypto/crypto_handshake_message.cc b/net/quic/core/crypto/crypto_handshake_message.cc
index fcaf59b5f6ff7d241e59e13946f78694d26bdb36..754aa2ee887294cdf06844da811ff610827ff6fa 100644
--- a/net/quic/core/crypto/crypto_handshake_message.cc
+++ b/net/quic/core/crypto/crypto_handshake_message.cc
@@ -6,16 +6,15 @@
 
 #include <memory>
 
-#include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "net/quic/core/crypto/crypto_framer.h"
 #include "net/quic/core/crypto/crypto_protocol.h"
 #include "net/quic/core/crypto/crypto_utils.h"
 #include "net/quic/core/quic_socket_address_coder.h"
 #include "net/quic/core/quic_utils.h"
+#include "net/quic/platform/api/quic_map_util.h"
 #include "net/quic/platform/api/quic_text_utils.h"
 
-using base::ContainsKey;
 using base::StringPiece;
 using base::StringPrintf;
 using std::string;
@@ -112,7 +111,7 @@ bool CryptoHandshakeMessage::GetStringPiece(QuicTag tag,
 }
 
 bool CryptoHandshakeMessage::HasStringPiece(QuicTag tag) const {
-  return ContainsKey(tag_value_map_, tag);
+  return QuicContainsKey(tag_value_map_, tag);
 }
 
 QuicErrorCode CryptoHandshakeMessage::GetNthValue24(QuicTag tag,