Add quic_map_util.

net/quic/test_tools/quic_session_peer.cc

Index: net/quic/test_tools/quic_session_peer.cc
diff --git a/net/quic/test_tools/quic_session_peer.cc b/net/quic/test_tools/quic_session_peer.cc
index 6ad8a40ac5daa2eebee571d6c969671b9dc5fd5e..1e35b9628fce9dd86cd7b1776e2f8dbb92c7a8b2 100644
--- a/net/quic/test_tools/quic_session_peer.cc
+++ b/net/quic/test_tools/quic_session_peer.cc
@@ -4,9 +4,9 @@
 
 #include "net/quic/test_tools/quic_session_peer.h"
 
-#include "base/stl_util.h"
 #include "net/quic/core/quic_session.h"
 #include "net/quic/core/quic_stream.h"
+#include "net/quic/platform/api/quic_map_util.h"
 
 namespace net {
 namespace test {
@@ -90,13 +90,13 @@ bool QuicSessionPeer::IsStreamClosed(QuicSession* session, QuicStreamId id) {
 // static
 bool QuicSessionPeer::IsStreamCreated(QuicSession* session, QuicStreamId id) {
   DCHECK_NE(0u, id);
-  return base::ContainsKey(session->dynamic_streams(), id);
+  return QuicContainsKey(session->dynamic_streams(), id);
 }
 
 // static
 bool QuicSessionPeer::IsStreamAvailable(QuicSession* session, QuicStreamId id) {
   DCHECK_NE(0u, id);
-  return base::ContainsKey(session->available_streams_, id);
+  return QuicContainsKey(session->available_streams_, id);
 }
 
 // static