QUIC - added force_hol_blocking field trial param to enable forced HOL blocking.

net/quic/quic_stream_factory_test.cc

Index: net/quic/quic_stream_factory_test.cc
diff --git a/net/quic/quic_stream_factory_test.cc b/net/quic/quic_stream_factory_test.cc
index c8da53ce761c46ee916fa88bd5dfb89cdd6bf715..739053e5ce96b281b38eba2d4ced366f017b4a9e 100644
--- a/net/quic/quic_stream_factory_test.cc
+++ b/net/quic/quic_stream_factory_test.cc
@@ -315,7 +315,8 @@ class QuicStreamFactoryTestBase {
         disable_quic_on_timeout_with_open_streams_(false),
         idle_connection_timeout_seconds_(kIdleConnectionTimeoutSeconds),
         migrate_sessions_on_network_change_(false),
-        migrate_sessions_early_(false) {
+        migrate_sessions_early_(false),
+        force_hol_blocking_(false) {
     clock_->AdvanceTime(QuicTime::Delta::FromSeconds(1));
   }
 
@@ -347,7 +348,7 @@ class QuicStreamFactoryTestBase {
         close_sessions_on_ip_change_,
         disable_quic_on_timeout_with_open_streams_,
         idle_connection_timeout_seconds_, migrate_sessions_on_network_change_,
-        migrate_sessions_early_, QuicTagVector(),
+        migrate_sessions_early_, force_hol_blocking_, QuicTagVector(),
         /*enable_token_binding*/ false));
     factory_->set_require_confirmation(false);
     EXPECT_FALSE(factory_->has_quic_server_info_factory());
@@ -540,6 +541,7 @@ class QuicStreamFactoryTestBase {
   int idle_connection_timeout_seconds_;
   bool migrate_sessions_on_network_change_;
   bool migrate_sessions_early_;
+  bool force_hol_blocking_;
 };
 
 class QuicStreamFactoryTest : public QuicStreamFactoryTestBase,