Avoid persisting of QUIC server config information in Stable and Beta

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 484cf0d27ff0bc71665f4c0667d29ea3bdfa5c06..7d12fc77e49333317067d6680a923e76ff267cb1 100644
--- a/chrome/browser/io_thread.h
+++ b/chrome/browser/io_thread.h
@@ -166,6 +166,7 @@ class IOThread : public content::BrowserThreadDelegate {
     Optional<bool> enable_quic;
     Optional<bool> enable_quic_https;
     Optional<bool> enable_quic_pacing;
+    Optional<bool> enable_quic_persist_server_info;
     Optional<bool> enable_quic_port_selection;
     Optional<size_t> quic_max_packet_length;
     Optional<net::QuicVersionVector> quic_supported_versions;
@@ -287,6 +288,10 @@ class IOThread : public content::BrowserThreadDelegate {
   bool ShouldEnableQuicPacing(const CommandLine& command_line,
                               base::StringPiece quic_trial_group);
 
+  // Returns true if Chromium should persist QUIC server config information to
+  // disk cache.
+  bool ShouldEnableQuicPersistServerInfo(const CommandLine& command_line);
+
   // 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.