Revert of Revert of Add a new enable_nonblocking_io field trial param for QUIC

chrome/browser/io_thread_unittest.cc

Index: chrome/browser/io_thread_unittest.cc
diff --git a/chrome/browser/io_thread_unittest.cc b/chrome/browser/io_thread_unittest.cc
index 49eded1523c45cb305557575679bb2139699592a..12c846c9893953f14bce4ce048c7145e807d6d96 100644
--- a/chrome/browser/io_thread_unittest.cc
+++ b/chrome/browser/io_thread_unittest.cc
@@ -139,6 +139,7 @@
   EXPECT_EQ(0.0f, params.quic_load_server_info_timeout_srtt_multiplier);
   EXPECT_FALSE(params.quic_enable_truncated_connection_ids);
   EXPECT_FALSE(params.quic_enable_connection_racing);
+  EXPECT_FALSE(params.quic_enable_non_blocking_io);
   EXPECT_FALSE(params.quic_disable_disk_cache);
   EXPECT_FALSE(IOThread::ShouldEnableQuicForDataReductionProxy());
 }
@@ -329,6 +330,15 @@
   EXPECT_TRUE(params.quic_enable_connection_racing);
 }
 
+TEST_F(IOThreadTest, QuicEnableNonBlockingIO) {
+  field_trial_group_ = "Enabled";
+  field_trial_params_["enable_non_blocking_io"] = "true";
+  ConfigureQuicGlobals();
+  net::HttpNetworkSession::Params params;
+  InitializeNetworkSessionParams(&params);
+  EXPECT_TRUE(params.quic_enable_non_blocking_io);
+}
+
 TEST_F(IOThreadTest, QuicDisableDiskCache) {
   field_trial_group_ = "Enabled";
   field_trial_params_["disable_disk_cache"] = "true";