[experiments] Enable flow_control_fixes by default (#31810)

bazel/experiments.bzl

@@ -21,9 +21,6 @@ EXPERIMENTS = {
         "core_end2end_tests": [
             "new_hpack_huffman_decoder",
         ],
-        "flow_control_test": [
-            "flow_control_fixes",
-        ],
         "hpack_test": [
             "new_hpack_huffman_decoder",
         ],
@@ -60,6 +57,7 @@ EXPERIMENTS = {
             "posix_event_engine_enable_polling",
         ],
         "flow_control_test": [
+            "flow_control_fixes",
             "tcp_read_chunks",
         ],
     },

src/core/lib/experiments/experiments.cc

@@ -65,8 +65,7 @@ const ExperimentMetadata g_experiment_metadata[] = {
     {"tcp_read_chunks", description_tcp_read_chunks, true},
     {"tcp_rcv_lowat", description_tcp_rcv_lowat, false},
     {"peer_state_based_framing", description_peer_state_based_framing, false},
-    {"flow_control_fixes", description_flow_control_fixes,
-     kDefaultForDebugOnly},
+    {"flow_control_fixes", description_flow_control_fixes, true},
     {"memory_pressure_controller", description_memory_pressure_controller,
      false},
     {"unconstrained_max_quota_buffer_size",

src/core/lib/experiments/experiments.yaml

@@ -73,8 +73,8 @@
 - name: flow_control_fixes
   description:
     Various fixes for flow control, max frame size setting.
-  default: debug
-  expiry: 2023/01/01
+  default: true
+  expiry: 2023/04/01
   owner: ctiller@google.com
   test_tags: ["flow_control_test"]
 - name: memory_pressure_controller