Roll src/net/third_party/quiche/src/ b93b64e6b..85240a12e (8 commits)

https://quiche.googlesource.com/quiche.git/+log/b93b64e6bec7..85240a12ed2b

$ git log b93b64e6b..85240a12e --date=short --no-merges --format='%ad %ae %s'
2019-12-23 rch Rename HandshakerDelegate to HandshakerInterface in QuicCryptoServerStream and QuicCryptoClientStream to make it clear that this is an interface which defines the handshaker as opposed to a delegate of the handshaker (Which is defined by the similarly named HandshakerDelegateInterface).
2019-12-23 wub gfe-relnote: For QUIC BBR v1 and v2, only produce one bandwidth/rtt sample per congestion event. Protected by --gfe2_reloadable_flag_quic_one_bw_sample_per_ack_event.
2019-12-23 ianswett Deprecate gfe2_reloadable_flag_quic_stop_reading_when_level_triggered.
2019-12-20 nharper gfe-relnote: Create handshaker for QuicCryptoServerStream in constructor instead of later. Protected by reloadable flag quic_set_server_handshaker_in_constructor.
2019-12-20 danzh gfe-relnote: n/a(code clean up) Add default definition of copy assignment for QuicPacketHeader.
2019-12-20 rch gfe-relnote: Drop QUIC INITIAL packets which are less than 1200 bytes. Protected by --gfe2_reloadable_flag_quic_drop_small_initial_packets
2019-12-20 wub gfe-relnote: Change quic::SendTimeState.bytes_in_flight to include the bytes from the packet just sent. Protected by v2 flag --gfe2_reloadable_flag_quic_bw_sampler_remove_packets_once_per_congestion_event2.
2019-12-20 wub gfe-relnote: (n/a) Add a QUIC BBRv2 simulator test to make sure inflight_hi is cut gradually upon loss from PROBE_UP. Test only.

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

R=rch@chromium.org

Change-Id: Id400aee98f6e184794f27f4aac554dbaa760ebeb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1982621Reviewed-by: Zhongyi Shi <zhongyi@chromium.org>
Commit-Queue: Dan Zhang <danzh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727492}

DEPS

@@ -310,7 +310,7 @@ 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': 'b93b64e6bec758514db173f168b1adc00169c14b',
+  'quiche_revision': '85240a12ed2b9ccb08ae449bca1bbf9eb93c8a12',
   # 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.

net/quic/quic_flags_list.h

@@ -129,12 +129,6 @@ QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_bbr_slower_startup4, true)
 // bandwidth samples app-limited if they're not filling the pipe.
 QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_bbr_flexible_app_limited, false)
 
-// If true, calling StopReading() on a level-triggered QUIC stream sequencer
-// will cause the sequencer to discard future data.
-QUIC_FLAG(bool,
-          FLAGS_quic_reloadable_flag_quic_stop_reading_when_level_triggered,
-          true)
-
 // When the STMP connection option is sent by the client, timestamps in the QUIC
 // ACK frame are sent and processed.
 QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_send_timestamps, false)
@@ -414,3 +408,28 @@ QUIC_FLAG(bool, FLAGS_quic_reloadable_flag_quic_interval_deque, false)
 QUIC_FLAG(bool,
           FLAGS_quic_reloadable_flag_quic_bbr2_cut_inflight_hi_gradually,
           false)
+
+// If true, the QUIC dispatcher will drop INITIAL packets that are too small.
+QUIC_FLAG(bool,
+          FLAGS_quic_reloadable_flag_quic_drop_small_initial_packets,
+          false)
+
+// If true, QUIC will call bandwidth sampler once per ack event, instead of once
+// per acked packet.
+QUIC_FLAG(bool,
+          FLAGS_quic_reloadable_flag_quic_one_bw_sample_per_ack_event,
+          false)
+
+// If true, QUIC will call bandwidth sampler once per ack event, instead of once
+// per acked packet.
+QUIC_FLAG(
+    bool,
+    FLAGS_quic_reloadable_flag_quic_bw_sampler_remove_packets_once_per_congestion_event2,
+    false)
+
+// If true, QuicCryptoServerStream creates its HandshakerDelegate in its
+// constructor instead of in OnSuccessfulVersionNegotiation.
+QUIC_FLAG(
+    bool,
+    FLAGS_quic_reloadable_flag_quic_create_server_handshaker_in_constructor,
+    false)