Chromeframe user-agent without need of HttpNegotiate patch.

chrome_frame/urlmon_url_request.cc

 // Copyright (c) 2010 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_frame/urlmon_url_request.h"
 
 #include <wininet.h>
 #include <urlmon.h>
 
 #include "base/scoped_ptr.h"
@@ skipping 538 matching lines @@
   if (!extra_headers().empty()) {
     // TODO(robertshield): We may need to sanitize headers on POST here.
     new_headers += extra_headers();
   }
 
   if (!referrer().empty()) {
     // Referrer is famously misspelled in HTTP:
     new_headers += StringPrintf("Referer: %s\r\n", referrer().c_str());
   }
 
+  // In the rare case if "User-Agent" string is already in |current_headers|.
+  new_headers += AppendCFUserAgentString(current_headers, NULL);
+
   if (!new_headers.empty()) {
     *additional_headers = reinterpret_cast<wchar_t*>(
         CoTaskMemAlloc((new_headers.size() + 1) * sizeof(wchar_t)));
 
     if (*additional_headers == NULL) {
       NOTREACHED();
       hr = E_OUTOFMEMORY;
     } else {
       lstrcpynW(*additional_headers, ASCIIToWide(new_headers).c_str(),
                 new_headers.size());
@@ skipping 586 matching lines @@
       privacy_info_.privacy_records[UTF8ToWide(url)];
 
   privacy_entry.flags |= flags;
   privacy_entry.policy_ref = UTF8ToWide(policy_ref);
 
   if (fire_privacy_event && IsWindow(notification_window_)) {
     PostMessage(notification_window_, WM_FIRE_PRIVACY_CHANGE_NOTIFICATION, 1,
                 0);
   }
 }