Remove QuicFrameList, because it's unused with the new QuicStreamSequencer.

net/quic/test_tools/quic_stream_sequencer_peer.cc

Index: net/quic/test_tools/quic_stream_sequencer_peer.cc
diff --git a/net/quic/test_tools/quic_stream_sequencer_peer.cc b/net/quic/test_tools/quic_stream_sequencer_peer.cc
index 1a6eae7c1f8f993e93dd201e6348037237fb9c02..739db22b4f2f73771a3ec35fe5f1f28fd75b338c 100644
--- a/net/quic/test_tools/quic_stream_sequencer_peer.cc
+++ b/net/quic/test_tools/quic_stream_sequencer_peer.cc
@@ -19,16 +19,6 @@ size_t QuicStreamSequencerPeer::GetNumBufferedBytes(
 }
 
 // static
-bool QuicStreamSequencerPeer::FrameOverlapsBufferedData(
-    QuicFrameList* buffer,
-    const QuicStreamFrame& frame) {
-  list<QuicFrameList::FrameData>::iterator it =
-      buffer->FindInsertionPoint(frame.offset, frame.frame_length);
-  return buffer->FrameOverlapsBufferedData(frame.offset, frame.frame_length,
-                                           it);
-}
-
-// static
 QuicStreamOffset QuicStreamSequencerPeer::GetCloseOffset(
     QuicStreamSequencer* sequencer) {
   return sequencer->close_offset_;