Move ProxyConfigService construction onto the IO thread.

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 65a94f6b17a34114cf390b1a153695cc3d7d67ca..e255875caf8da9b4e4b0a889c5d40134d8557c72 100644
--- a/chrome/browser/profiles/profile_io_data.h
+++ b/chrome/browser/profiles/profile_io_data.h
@@ -206,10 +206,8 @@ class ProfileIOData {
     scoped_ptr<net::URLRequestJobFactory::Interceptor>
         protocol_handler_interceptor;
 
-    // We need to initialize the ProxyConfigService from the UI thread
-    // because on linux it relies on initializing things through gconf,
-    // and needs to be on the main thread.
-    scoped_ptr<net::ProxyConfigService> proxy_config_service;
+    // Used on the UI thread to return a pointer to the Profile.
+    base::Callback<Profile*(void)> profile_getter;
     // The profile this struct was populated from. It's passed as a void* to
     // ensure it's not accidently used on the IO thread. Before using it on the
     // UI thread, call ProfileManager::IsValidProfile to ensure it's alive.