Fix bug in net::RequestPriority -> HTTP/2 dependency conversion.

ios/chrome/browser/ios_chrome_io_thread.h

 // Copyright 2015 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 IOS_CHROME_BROWSER_IOS_CHROME_IO_THREAD_H_
 #define IOS_CHROME_BROWSER_IOS_CHROME_IO_THREAD_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 123 matching lines @@
     uint16_t testing_fixed_https_port;
     Optional<bool> enable_tcp_fast_open_for_ssl;
 
     Optional<bool> enable_spdy31;
     Optional<bool> enable_http2;
     Optional<bool> parse_alternative_services;
     Optional<bool> enable_alternative_service_with_different_host;
 
     Optional<bool> enable_npn;
 
+    Optional<bool> enable_priority_dependencies;
+
     Optional<bool> enable_quic;
     Optional<bool> enable_quic_for_proxies;
     Optional<bool> quic_always_require_handshake_confirmation;
     Optional<bool> quic_disable_connection_pooling;
     Optional<float> quic_load_server_info_timeout_srtt_multiplier;
     Optional<bool> quic_enable_connection_racing;
     Optional<bool> quic_enable_non_blocking_io;
     Optional<bool> quic_disable_disk_cache;
     Optional<bool> quic_prefer_aes;
     Optional<int> quic_max_number_of_lossy_connections;
@@ skipping 91 matching lines @@
   // SystemRequestContext state has been initialized on the UI thread.
   void InitSystemRequestContextOnIOThread();
 
   void CreateDefaultAuthHandlerFactory();
 
   // Returns an SSLConfigService instance.
   net::SSLConfigService* GetSSLConfigService();
 
   void ChangedToOnTheRecordOnIOThread();
 
+  // Configure whether we set HTTP/2 dependencies from the
+  // net::RequestPriority.
+  void ConfigurePriorityDependencies();
+
   // Configures QUIC options based on the QUIC field trial group.
   void ConfigureQuic();
 
   // Configures QUIC options in |globals| based on the flags in |command_line|
   // as well as the QUIC field trial group and parameters.
   // Must be called before ConfigureSpdyGlobals.
   static void ConfigureQuicGlobals(base::StringPiece quic_trial_group,
                                    const VariationParameters& quic_trial_params,
                                    Globals* globals);
 
@@ skipping 120 matching lines @@
       system_url_request_context_getter_;
 
   const base::TimeTicks creation_time_;
 
   base::WeakPtrFactory<IOSChromeIOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOSChromeIOThread);
 };
 
 #endif  // IOS_CHROME_BROWSER_IOS_CHROME_IO_THREAD_H_