Move ProxyConfigService construction onto the IO thread.

net/proxy/proxy_service.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 NET_PROXY_PROXY_SERVICE_H_
 #define NET_PROXY_PROXY_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 183 matching lines @@
   // Clears the list of bad proxy servers that has been cached.
   void ClearBadProxiesCache() {
     proxy_retry_info_.clear();
   }
 
   // Forces refetching the proxy configuration, and applying it.
   // This re-does everything from fetching the system configuration,
   // to downloading and testing the PAC files.
   void ForceReloadProxyConfig();
 
+  // Give ProxyConfigService a chance to perform shutdown work.
+  void StartTearDown();
+
   // Same as CreateProxyServiceUsingV8ProxyResolver, except it uses system
   // libraries for evaluating the PAC script if available, otherwise skips
   // proxy autoconfig.
   static ProxyService* CreateUsingSystemProxyResolver(
       ProxyConfigService* proxy_config_service,
       size_t num_pac_threads,
       NetLog* net_log);
 
   // Creates a ProxyService without support for proxy autoconfig.
   static ProxyService* CreateWithoutProxyResolver(
@@ skipping 13 matching lines @@
   // This method is used by tests to create a ProxyService that returns a
   // hardcoded proxy fallback list (|pac_string|) for every URL.
   //
   // |pac_string| is a list of proxy servers, in the format that a PAC script
   // would return it. For example, "PROXY foobar:99; SOCKS fml:2; DIRECT"
   static ProxyService* CreateFixedFromPacResult(const std::string& pac_string);
 
   // Creates a config service appropriate for this platform that fetches the
   // system proxy settings.
   static ProxyConfigService* CreateSystemProxyConfigService(
-      base::SingleThreadTaskRunner* io_thread_task_runner,
+      base::SingleThreadTaskRunner* glib_thread_task_runner,

[digit1, 2012/10/19 10:32:46]

Probably use main_thread_task_runner here.

       MessageLoop* file_loop);
 
   // This method should only be used by unit tests.
   void set_stall_proxy_auto_config_delay(base::TimeDelta delay) {
     stall_proxy_auto_config_delay_ = delay;
   }
 
   // This method should only be used by unit tests. Returns the previously
   // active policy.
   static const PacPollPolicy* set_pac_script_poll_policy(
@@ skipping 178 matching lines @@
 
   base::WaitableEvent event_;
   CompletionCallback callback_;
   ProxyInfo proxy_info_;
   int result_;
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SERVICE_H_