[ResourceScheduler] Throttle H2/QUIC requests just like we do for 1.1

content/browser/loader/resource_scheduler.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_LOADER_RESOURCE_SCHEDULER_H_
 #define CONTENT_BROWSER_LOADER_RESOURCE_SCHEDULER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 119 matching lines @@
   // Returns the client ID for the given |child_id| and |route_id| combo.
   ClientId MakeClientId(int child_id, int route_id);
 
   // Returns the client for the given |child_id| and |route_id| combo.
   Client* GetClient(int child_id, int route_id);
 
   ClientMap client_map_;
   size_t max_num_delayable_requests_;
   RequestSet unowned_requests_;
 
+  // True if requests to servers that support priorities (e.g., H2/QUIC) can
+  // be delayed.
+  bool priority_requests_delayable_;
+
   DISALLOW_COPY_AND_ASSIGN(ResourceScheduler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_RESOURCE_SCHEDULER_H_