Move ASCIIToWide and ASCIIToUTF16 to utf_string_conversions.h. I've found it...

chrome/browser/net/connection_tester.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/browser/net/connection_tester.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
+#include "base/utf_string_conversions.h"
 #include "chrome/browser/importer/firefox_proxy_settings.h"
 #include "chrome/common/chrome_switches.h"
 #include "net/base/cookie_monster.h"
 #include "net/base/host_resolver_impl.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
 #include "net/base/ssl_config_service_defaults.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/ftp/ftp_network_layer.h"
 #include "net/http/http_auth_handler_factory.h"
@@ skipping 368 matching lines @@
 
   // Notify the delegate of completion.
   delegate_->OnCompletedConnectionTestExperiment(current, result);
 
   if (remaining_experiments_.empty()) {
     delegate_->OnCompletedConnectionTestSuite();
   } else {
     StartNextExperiment();
   }
 }