Convert string16 to base::string16 in content.

content/child/service_worker/service_worker_dispatcher.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/child/service_worker/service_worker_dispatcher.h"
 
 #include "base/lazy_instance.h"
 #include "base/threading/thread_local.h"
 #include "content/child/service_worker/web_service_worker_impl.h"
 #include "content/child/thread_safe_sender.h"
@@ skipping 115 matching lines @@
     return;
 
   callbacks->onSuccess(NULL);
   pending_callbacks_.Remove(request_id);
 }
 
 void ServiceWorkerDispatcher::OnRegistrationError(
     int32 thread_id,
     int32 request_id,
     WebServiceWorkerError::ErrorType error_type,
-    const string16& message) {
+    const base::string16& message) {
   WebServiceWorkerProvider::WebServiceWorkerCallbacks* callbacks =
       pending_callbacks_.Lookup(request_id);
   DCHECK(callbacks);
   if (!callbacks)
     return;
 
   scoped_ptr<WebServiceWorkerError>  error(
       new WebServiceWorkerError(error_type, message));
   callbacks->onError(error.release());
   pending_callbacks_.Remove(request_id);
 }
 
 void ServiceWorkerDispatcher::OnWorkerRunLoopStopped() { delete this; }
 
 }  // namespace content