Deflake //third_party/quic/core/http:end_to_end_test.

PiperOrigin-RevId: 314411706
Change-Id: I1839941aad7e0ffe72cecbbbf20ffca88185748b

quic/core/http/end_to_end_test.cc

diff --git a/quic/core/http/end_to_end_test.cc b/quic/core/http/end_to_end_test.cc
index 8b350ee..c7a983c 100644
--- a/quic/core/http/end_to_end_test.cc
+++ b/quic/core/http/end_to_end_test.cc
@@ -196,6 +196,10 @@
 
     AddToCache("/foo", 200, kFooResponseBody);
     AddToCache("/bar", 200, kBarResponseBody);
+    // Enable fixes for bugs found in tests and prod.
+    SetQuicReloadableFlag(quic_donot_change_queued_ack, true);
+    SetQuicReloadableFlag(quic_fix_last_inflight_packets_sent_time, true);
+    SetQuicReloadableFlag(quic_fix_server_pto_timeout, true);
   }
 
   ~EndToEndTest() override { QuicRecyclePort(server_address_.port()); }