Update uses of UTF conversions in content/ to use the base:: namespace.

content/browser/service_worker/service_worker_registration_status.cc

 // Copyright 2013 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 "content/browser/service_worker/service_worker_registration_status.h"
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 
 namespace {
@@ skipping 10 matching lines @@
     blink::WebServiceWorkerError::ErrorType* error_type,
     base::string16* message) {
   switch (status) {
     case REGISTRATION_OK:
       NOTREACHED() << "Consumers should check registration status before "
                       "calling this function.";
       return;
 
     case REGISTRATION_INSTALL_FAILED:
       *error_type = WebServiceWorkerError::InstallError;
-      *message = ASCIIToUTF16(kInstallFailedErrorMessage);
+      *message = base::ASCIIToUTF16(kInstallFailedErrorMessage);
       return;
 
     case REGISTRATION_ACTIVATE_FAILED:
       *error_type = WebServiceWorkerError::ActivateError;
-      *message = ASCIIToUTF16(kActivateFailedErrorMessage);
+      *message = base::ASCIIToUTF16(kActivateFailedErrorMessage);
       return;
   }
   NOTREACHED();
 }
 }  // namespace content