Revert of QUIC - Deleted disable_loading_server_info_for_new_servers field trial.

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 2dbd9677d39cdefdf3d6cdad52bf7b0e4bef6e64..d487b50d708712657ed266a765901b9e9b5df0f7 100644
--- a/chrome/browser/io_thread.h
+++ b/chrome/browser/io_thread.h
@@ -192,6 +192,7 @@
     Optional<bool> quic_always_require_handshake_confirmation;
     Optional<bool> quic_disable_connection_pooling;
     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;
@@ -372,6 +373,10 @@
   static int GetQuicLoadServerInfoTimeout(
       const VariationParameters& quic_trial_params);
 
+  // Returns true if QUIC sever information shouldn't be loaded for new servers.
+  static bool ShouldDisableLoadingServerInfoForNewServers(
+      const VariationParameters& quic_trial_params);
+
   // Returns the ratio of time to load QUIC sever information from disk cache to
   // 'smoothed RTT' based on field trial. Returns 0 if there is an error parsing
   // the field trial params, or if the default value should be used.