Handle extension webrequest API on the IO thread. This speeds up blocking event

chrome/browser/profiles/profile_io_data.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/profiles/profile_io_data.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
@@ skipping 388 matching lines @@
   // Create the common request contexts.
   main_request_context_ = new RequestContext;
   extensions_request_context_ = new RequestContext;
 
   profile_params_->appcache_service->set_request_context(main_request_context_);
 
   chrome_url_data_manager_backend_.reset(new ChromeURLDataManagerBackend);
 
   network_delegate_.reset(new ChromeNetworkDelegate(
         io_thread_globals->extension_event_router_forwarder.get(),
+        profile_params_->extension_info_map,
         profile_params_->profile_id,
         &enable_referrers_));
 
   dns_cert_checker_.reset(
       CreateDnsCertProvenanceChecker(io_thread_globals->dnsrr_resolver.get(),
                                      main_request_context_));
 
   proxy_service_.reset(
       ProxyServiceFactory::CreateProxyService(
           io_thread->net_log(),
@@ skipping 90 matching lines @@
   context->set_appcache_service(profile_params_->appcache_service);
   context->set_blob_storage_context(profile_params_->blob_storage_context);
   context->set_file_system_context(profile_params_->file_system_context);
   context->set_extension_info_map(profile_params_->extension_info_map);
 }
 
 void ProfileIOData::ShutdownOnUIThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   enable_referrers_.Destroy();
 }