Break out the basic reliable QUIC stream functionality from the

net/quic/test_tools/reliable_quic_stream_peer.cc

Index: net/quic/test_tools/reliable_quic_stream_peer.cc
diff --git a/net/quic/test_tools/reliable_quic_stream_peer.cc b/net/quic/test_tools/reliable_quic_stream_peer.cc
index 31a64e94a4537564f173adac90109db4af51d984..5119d035faa880c76e24cf598db3f16e56cfd8fc 100644
--- a/net/quic/test_tools/reliable_quic_stream_peer.cc
+++ b/net/quic/test_tools/reliable_quic_stream_peer.cc
@@ -22,11 +22,5 @@ void ReliableQuicStreamPeer::SetStreamBytesWritten(
   stream->stream_bytes_written_ = stream_bytes_written;
 }
 
-void ReliableQuicStreamPeer::SetHeadersDecompressed(
-    ReliableQuicStream* stream,
-    bool headers_decompressed) {
-  stream->headers_decompressed_ = headers_decompressed;
-}
-
 }  // namespace test
 }  // namespace net