Simplify the user agent code some more since after r255534 it's not affected by the site's URL.

net/url_request/url_request_http_job.cc

 // 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.
 
 #include "net/url_request/url_request_http_job.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
@@ skipping 252 matching lines @@
   // Our consumer should have made sure that this is a safe referrer.  See for
   // instance WebCore::FrameLoader::HideReferrer.
   if (referrer.is_valid()) {
     request_info_.extra_headers.SetHeader(HttpRequestHeaders::kReferer,
                                           referrer.spec());
   }
 
   request_info_.extra_headers.SetHeaderIfMissing(
       HttpRequestHeaders::kUserAgent,
       http_user_agent_settings_ ?
-          http_user_agent_settings_->GetUserAgent(request_->url()) :
-          std::string());
+          http_user_agent_settings_->GetUserAgent() : std::string());
 
   AddExtraHeaders();
   AddCookieHeaderAndStart();
 }
 
 void URLRequestHttpJob::Kill() {
   if (!transaction_.get())
     return;
 
   weak_factory_.InvalidateWeakPtrs();
@@ skipping 1181 matching lines @@
   return override_response_headers_.get() ?
              override_response_headers_.get() :
              transaction_->GetResponseInfo()->headers.get();
 }
 
 void URLRequestHttpJob::NotifyURLRequestDestroyed() {
   awaiting_callback_ = false;
 }
 
 }  // namespace net