Simplify threading in browser thread by making only ChromeThread deal with di...

chrome/browser/renderer_host/resource_dispatcher_host.cc

 // Copyright (c) 2009 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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "chrome/browser/renderer_host/resource_dispatcher_host.h"
 
 #include <vector>
 
@@ skipping 304 matching lines @@
 }
 
 void ResourceDispatcherHost::OnShutdown() {
   DCHECK(MessageLoop::current() == io_loop_);
   is_shutdown_ = true;
   STLDeleteValues(&pending_requests_);
   // Make sure we shutdown the timer now, otherwise by the time our destructor
   // runs if the timer is still running the Task is deleted twice (once by
   // the MessageLoop and the second time by RepeatingTimer).
   update_load_states_timer_.Stop();
-  // Let the WebKit thread know the IO thread is going away soon and that it
-  // should prepare for its own shutdown soon after.
-  webkit_thread_->Shutdown();
 }
 
 bool ResourceDispatcherHost::HandleExternalProtocol(int request_id,
                                                     int child_id,
                                                     int route_id,
                                                     const GURL& url,
                                                     ResourceType::Type type,
                                                     ResourceHandler* handler) {
   if (!ResourceType::IsFrame(type) || URLRequest::IsHandledURL(url))
     return false;
@@ skipping 1465 matching lines @@
     case ViewHostMsg_UploadProgress_ACK::ID:
     case ViewHostMsg_SyncLoad::ID:
       return true;
 
     default:
       break;
   }
 
   return false;
 }