QUIC - enabled FLAGS_allow_truncated_connection_ids_for_quic

chrome/browser/io_thread.h

Index: chrome/browser/io_thread.h
diff --git a/chrome/browser/io_thread.h b/chrome/browser/io_thread.h
index 8f46fc1ec8ab8d9b8d4189570ae37a5666ed5382..89ca3b748ef2298f1348247eee8fc6f95621ba4d 100644
--- a/chrome/browser/io_thread.h
+++ b/chrome/browser/io_thread.h
@@ -194,6 +194,7 @@ class IOThread : public content::BrowserThreadDelegate {
     Optional<int> quic_load_server_info_timeout_ms;
     Optional<bool> quic_disable_loading_server_info_for_new_servers;
     Optional<float> quic_load_server_info_timeout_srtt_multiplier;
+    Optional<bool> quic_enable_truncated_connection_ids;
     Optional<size_t> quic_max_packet_length;
     net::QuicTagVector quic_connection_options;
     Optional<std::string> quic_user_agent_id;
@@ -383,6 +384,10 @@ class IOThread : public content::BrowserThreadDelegate {
   static float GetQuicLoadServerInfoTimeoutSrttMultiplier(
       const VariationParameters& quic_trial_params);
 
+  // Returns true if QUIC's TruncatedConnectionIds should be enabled.
+  static bool ShouldQuicEnableTruncatedConnectionIds(
+      const VariationParameters& quic_trial_params);
+
   // Returns the maximum length for QUIC packets, based on any flags in
   // |command_line| or the field trial.  Returns 0 if there is an error
   // parsing any of the options, or if the default value should be used.