Roll src/net/third_party/quiche/src/ 5c03085cf..b402517c0 (6 commits)

https://quiche.googlesource.com/quiche.git/+log/5c03085cff01..b402517c01d4

$ git log 5c03085cf..b402517c0 --date=short --no-merges --format='%ad %ae %s'
2019-07-12 bnc Use HpackEntry::Size() instead of rolling our own in QpackDynamicTable.
2019-07-12 bnc Refactor EncodeRequiredInsertCount() and DecodeRequiredInsertCount().
2019-07-12 quiche-dev Delete the unused QuartcEndpointImpl class.
2019-07-12 fkastenholz Add retire_prior_to to NewConnectionId frame
2019-07-12 danzh gfe-relnote: n/a(code cleanup) enable -Wreturn-type compile option in third_party/quic.
2019-07-12 renjietang Change names of static-related QuicSession methods.

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

Change-Id: I60847d68cf31059bc4d91d9ce63205c342cecb3c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1699314
Commit-Queue: Zhongyi Shi <zhongyi@chromium.org>
Auto-Submit: Bence Béky <bnc@chromium.org>
Reviewed-by: Zhongyi Shi <zhongyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#677393}