Roll src/net/third_party/quiche/src/ b38e63550..91ae39183 (7 commits)

https://quiche.googlesource.com/quiche.git/+log/b38e63550203..91ae3918387e

$ git log b38e63550..91ae39183 --date=short --no-merges --format='%ad %ae %s'
2019-10-25 fkastenholz Remove empty if statement
2019-10-24 rch gfe-relnote: n/a - Rephrase obsolete TODO which was left over from when v40 was added.
2019-10-24 rch Remove an obsolete TODO from quic_framer.cc about changing the public packet header format for post v32 versions. This todo was adding in the fallout from the PAN drama. But I think it's not worth the risk of touching the header format again so let's just leave it alone and it'll be moot once v43 is removed.
2019-10-24 rch gfe-relnote: n/a - Remove useless DVLOG from quic_crypto_server_config.cc
2019-10-24 renjietang Fix Reset logic in PendingStream.
2019-10-24 fayang gfe-relnote: Add QuicPacketCreator::SerializeCoalescedPacket function. Not used yet. Not protected.
2019-10-24 wub Fix 26 ClangTidy - Readability findings in //depot/google3/third_party/quic/.

Created with:
  roll-dep src/net/third_party/quiche/src src/third_party/quic_trace/src

Change-Id: I83cb08ce6451c90222ed40536fd29fa9a60d8ff5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1879198
Commit-Queue: Ryan Hamilton <rch@chromium.org>
Reviewed-by: Ryan Hamilton <rch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709513}

DEPS

@@ -314,7 +314,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'quiche_revision': 'b38e635502035083ead0d64e26026ee724238c65',
+  'quiche_revision': '91ae3918387e152674f9ef30ca5821a83de6a0fd',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ios_webkit
   # and whatever else without interference from each other.