QUIC test-only change. Removes unnecessary mock method.

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 bdc7d6a80b526c836d50e5f98907287ce63d9be5..bf3fad0929ab230ea2d4a004c7c4a74b7127154f 100644
--- a/net/quic/test_tools/quic_test_utils.h
+++ b/net/quic/test_tools/quic_test_utils.h
@@ -531,11 +531,6 @@ class MockQuicSession : public QuicSession {
                void(QuicStreamId stream_id, SpdyPriority priority));
   MOCK_METHOD3(OnStreamHeadersComplete,
                void(QuicStreamId stream_id, bool fin, size_t frame_len));
-  MOCK_METHOD4(OnStreamHeaderList,
-               void(QuicStreamId stream_id,
-                    bool fin,
-                    size_t frame_len,
-                    const QuicHeaderList& header_list));
   MOCK_METHOD0(IsCryptoHandshakeConfirmed, bool());
 
   using QuicSession::ActivateStream;