gfe-relnote: (n/a) Change SetQuicFlag to take the flag variable directly instead of a pointer to it. Refactor for Envoy integration, no behavior change.

This is needed for Envoy integration because the current syntax(SetQuicFlag(&FLAG_foo)) requires FLAG_foo is a valid c++ identifier, which is not the case in Envoy.

PiperOrigin-RevId: 246196929
Change-Id: I7d56b23f0fa51fcdd17acc0837508710316a6826
diff --git a/quic/quartc/quartc_factory.cc b/quic/quartc/quartc_factory.cc
index 436212f..f01aa48 100644
--- a/quic/quartc/quartc_factory.cc
+++ b/quic/quartc/quartc_factory.cc
@@ -68,7 +68,7 @@
 
   // Ensure that we don't drop data because QUIC streams refuse to buffer it.
   // TODO(b/120099046):  Replace this with correct handling of WriteMemSlices().
-  SetQuicFlag(&FLAGS_quic_buffered_data_threshold,
+  SetQuicFlag(FLAGS_quic_buffered_data_threshold,
               std::numeric_limits<int>::max());
 
   // TODO(b/117157454): Perform version negotiation for Quartc outside of