Add a new enable_nonblocking_io field trial param for QUIC

chrome/browser/io_thread.cc

Index: chrome/browser/io_thread.cc
diff --git a/chrome/browser/io_thread.cc b/chrome/browser/io_thread.cc
index fc173885c80808cceaecbb40152549f9de953bf3..6d7e6c6392fb9ce3d29a4bfadebbca33c6cfab97 100644
--- a/chrome/browser/io_thread.cc
+++ b/chrome/browser/io_thread.cc
@@ -1032,6 +1032,8 @@ void IOThread::InitializeNetworkSessionParamsFromGlobals(
       &params->quic_enable_truncated_connection_ids);
   globals.quic_enable_connection_racing.CopyToIfSet(
       &params->quic_enable_connection_racing);
+  globals.quic_enable_nonblocking_io.CopyToIfSet(
+      &params->quic_enable_nonblocking_io);
   globals.quic_disable_disk_cache.CopyToIfSet(
       &params->quic_disable_disk_cache);
   globals.enable_quic_port_selection.CopyToIfSet(
@@ -1168,6 +1170,8 @@ void IOThread::ConfigureQuicGlobals(
         ShouldQuicEnableTruncatedConnectionIds(quic_trial_params));
     globals->quic_enable_connection_racing.set(
         ShouldQuicEnableConnectionRacing(quic_trial_params));
+    globals->quic_enable_nonblocking_io.set(
+        ShouldQuicEnableNonblockingIO(quic_trial_params));
     globals->quic_disable_disk_cache.set(
         ShouldQuicDisableDiskCache(quic_trial_params));
     globals->enable_quic_port_selection.set(
@@ -1375,6 +1379,14 @@ bool IOThread::ShouldQuicEnableConnectionRacing(
 }
 
 // static
+bool IOThread::ShouldQuicEnableNonblockingIO(
+    const VariationParameters& quic_trial_params) {
+  return LowerCaseEqualsASCII(
+      GetVariationParam(quic_trial_params, "enable_nonblocking_io"),
+      "true");
+}
+
+// static
 bool IOThread::ShouldQuicDisableDiskCache(
     const VariationParameters& quic_trial_params) {
   return LowerCaseEqualsASCII(