Change the QUIC CongestionMap to be based on a vector.

net/quic/test_tools/quic_test_utils.h

Index: net/quic/test_tools/quic_test_utils.h
diff --git a/net/quic/test_tools/quic_test_utils.h b/net/quic/test_tools/quic_test_utils.h
index 7d346926d8d74685f82ab9dc244cba9a209637c1..31564fcddab7cbf5d47f8025c90b431c3464e90a 100644
--- a/net/quic/test_tools/quic_test_utils.h
+++ b/net/quic/test_tools/quic_test_utils.h
@@ -448,8 +448,8 @@ class MockSendAlgorithm : public SendAlgorithmInterface {
                     QuicTime feedback_receive_time));
   MOCK_METHOD4(OnCongestionEvent, void(bool rtt_updated,
                                        QuicByteCount bytes_in_flight,
-                                       const CongestionMap& acked_packets,
-                                       const CongestionMap& lost_packets));
+                                       const CongestionVector& acked_packets,
+                                       const CongestionVector& lost_packets));
   MOCK_METHOD5(OnPacketSent,
                bool(QuicTime, QuicByteCount, QuicPacketSequenceNumber,
                     QuicByteCount, HasRetransmittableData));