Remove dead extensions tracking code.

chrome/browser/extensions/chrome_content_browser_client_extensions_part.cc

 // Copyright 2014 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/extensions/chrome_content_browser_client_extensions_part.h"
 
 #include <stddef.h>
 
 #include <set>
 
@@ skipping 546 matching lines @@
 
   host->AddFilter(new ChromeExtensionMessageFilter(id, profile));
   host->AddFilter(new ExtensionMessageFilter(id, profile));
   host->AddFilter(new IOThreadExtensionMessageFilter(id, profile));
   host->AddFilter(new ExtensionsGuestViewMessageFilter(id, profile));
   if (extensions::ExtensionsClient::Get()
           ->ExtensionAPIEnabledInExtensionServiceWorkers()) {
     host->AddFilter(new ExtensionServiceWorkerMessageFilter(
         id, profile, host->GetStoragePartition()->GetServiceWorkerContext()));
   }
-  extension_web_request_api_helpers::SendExtensionWebRequestStatusToHost(host);
 }
 
 void ChromeContentBrowserClientExtensionsPart::SiteInstanceGotProcess(
     SiteInstance* site_instance) {
   BrowserContext* context = site_instance->GetProcess()->GetBrowserContext();
   ExtensionRegistry* registry = ExtensionRegistry::Get(context);
   if (!registry)
     return;
 
   const Extension* extension =
@@ skipping 109 matching lines @@
     command_line->AppendSwitch(switches::kExtensionProcess);
   }
 }
 
 void ChromeContentBrowserClientExtensionsPart::ResourceDispatcherHostCreated() {
   content::ResourceDispatcherHost::Get()->RegisterInterceptor(
       "Origin", kExtensionScheme, base::Bind(&OnHttpHeaderReceived));
 }
 
 }  // namespace extensions