Respect QuicAllowed policy for new streams

chrome/browser/profiles/profile_io_data.h

Index: chrome/browser/profiles/profile_io_data.h
diff --git a/chrome/browser/profiles/profile_io_data.h b/chrome/browser/profiles/profile_io_data.h
index 4a5666273294a96ae2a26c5c3f7b5c18b072d98b..43d4a68e6d1f0f43fecade9087f8da842c849174 100644
--- a/chrome/browser/profiles/profile_io_data.h
+++ b/chrome/browser/profiles/profile_io_data.h
@@ -22,6 +22,7 @@
 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
 #include "chrome/browser/devtools/devtools_network_controller_handle.h"
 #include "chrome/browser/io_thread.h"
+#include "chrome/browser/profiles/net_http_session_params_observer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/storage_partition_descriptor.h"
 #include "chrome/common/features.h"
@@ -264,6 +265,10 @@ class ProfileIOData {
   // Get platform ClientCertStore. May return nullptr.
   std::unique_ptr<net::ClientCertStore> CreateClientCertStore();
 
+  // Called on IO thread thread when net parameters change (e.g. due to policy).
+  void UpdateNetParamsOnIOThread(
+      net::HttpNetworkSession::ParamsUpdate params_update);
+
  protected:
   // A URLRequestContext for media that owns its HTTP factory, to ensure
   // it is deleted.
@@ -552,6 +557,11 @@ class ProfileIOData {
 
   BooleanPrefMember enable_metrics_;
 
+  // Observes profile's preference for changes to prefs which affect
+  // HttpNetworkSession params.
+  std::unique_ptr<NetHttpSessionParamsObserver>
+      net_http_session_params_observer_;
+
   // Pointed to by NetworkDelegate.
   mutable std::unique_ptr<policy::URLBlacklistManager> url_blacklist_manager_;
   mutable std::unique_ptr<policy::PolicyHeaderIOHelper> policy_header_helper_;