Make ProfileIOData's ProxyService fetch PACs with the main URLRequestContext

chrome/browser/profiles/profile_io_data.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 CHROME_BROWSER_PROFILES_PROFILE_IO_DATA_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_IO_DATA_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 431 matching lines @@
 
   typedef std::map<StoragePartitionDescriptor,
                    net::URLRequestContext*,
                    StoragePartitionDescriptorLess>
       URLRequestContextMap;
 
   // --------------------------------------------
   // Virtual interface for subtypes to implement:
   // --------------------------------------------
 
+  // Does any necessary addition configuration of the network delegate,

[eroman, 2017/05/02 21:29:34]

additional

[mmenke, 2017/05/02 21:33:59]

Done.

+  // including composing it with other NetworkDelegates, if needed. By default,
+  // just returns the input NetworkDelegate.
+  virtual std::unique_ptr<net::NetworkDelegate> ConfigureNetworkDelegate(
+      IOThread* io_thread,
+      std::unique_ptr<ChromeNetworkDelegate> chrome_network_delegate) const;
+
   // Does the actual initialization of the ProfileIOData subtype. Subtypes
   // should use the static helper functions above to implement this.
   virtual void InitializeInternal(
-      std::unique_ptr<ChromeNetworkDelegate> chrome_network_delegate,
       ProfileParams* profile_params,
       content::ProtocolHandlerMap* protocol_handlers,
       content::URLRequestInterceptorScopedVector request_interceptors)
       const = 0;
 
   // Initializes the RequestContext for extensions.
   virtual void InitializeExtensionsRequestContext(
       ProfileParams* profile_params) const = 0;
   // Does an on-demand initialization of a RequestContext for the given
   // isolated app.
@@ skipping 145 matching lines @@
   mutable std::unique_ptr<certificate_transparency::TreeStateTracker>
       ct_tree_tracker_;
   mutable base::Closure ct_tree_tracker_unregistration_;
 
   const Profile::ProfileType profile_type_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileIOData);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_IO_DATA_H_