Shut down Profile's URLRequestContextGetters safely.

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 <map>
 #include <string>
 #include <vector>
@@ skipping 310 matching lines @@
   void ApplyProfileParamsToContext(net::URLRequestContext* context) const;
 
   scoped_ptr<net::URLRequestJobFactory> SetUpJobFactoryDefaults(
       scoped_ptr<net::URLRequestJobFactoryImpl> job_factory,
       content::URLRequestInterceptorScopedVector request_interceptors,
       scoped_ptr<ProtocolHandlerRegistry::JobInterceptorFactory>
           protocol_handler_interceptor,
       net::NetworkDelegate* network_delegate,
       net::FtpTransactionFactory* ftp_transaction_factory) const;
 
-  // Called when the profile is destroyed.
+  // Called when the Profile is destroyed. |context_getters| must include all
+  // URLRequestContextGetters that refer to the ProfileIOData's
+  // URLRequestContexts. Triggers destruction of the ProfileIOData and shuts
+  // down |context_getters| safely on the IO thread.
+  // TODO(mmenke):  Passing all those URLRequestContextGetters around like this
+  //     is really silly.  Can we do something cleaner?
   void ShutdownOnUIThread(
       scoped_ptr<ChromeURLRequestContextGetterVector> context_getters);
 
   // A ChannelIDService object is created by a derived class of
   // ProfileIOData, and the derived class calls this method to set the
   // channel_id_service_ member and transfers ownership to the base
   // class.
   void set_channel_id_service(
       net::ChannelIDService* channel_id_service) const;
 
@@ skipping 234 matching lines @@
 
   // TODO(jhawkins): Remove once crbug.com/102004 is fixed.
   bool initialized_on_UI_thread_;
 
   const Profile::ProfileType profile_type_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileIOData);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_IO_DATA_H_