[fsp] Use types from another namespaces in IDL.

chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.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 "chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.h"
 
 #include <string>
 
 #include "base/values.h"
 #include "chrome/browser/chromeos/file_system_provider/service.h"
@@ skipping 165 matching lines @@
 
 bool FileSystemProviderInternalUnmountRequestedErrorFunction::RunImpl() {
   using api::file_system_provider_internal::UnmountRequestedError::Params;
   const scoped_ptr<Params> params(Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params);
 
   chromeos::file_system_provider::Service* service =
       chromeos::file_system_provider::Service::Get(GetProfile());
   DCHECK(service);
 
-  // Currently it is not possible to refer to types/enums defined in a different
-  // IDL file. Therefore we need to convert DOMString to ProviderError, since
-  // UnmountRequestedErrorFunction() is defined in a different namespace than
-  // ProvidedError.
-  // TODO(mtomasz): Remove this trick, once IDL supports namespaces correctly.
-  const api::file_system_provider::ProviderError provider_error =
-      api::file_system_provider::ParseProviderError(params->error);
-
   if (!service->RejectRequest(extension_id(),
                               params->file_system_id,
                               params->request_id,
-                              ProviderErrorToFileError(provider_error))) {
+                              ProviderErrorToFileError(params->error))) {
     // TODO(mtomasz): Pass more detailed errors, rather than just a bool.
     base::ListValue* result = new base::ListValue();
     result->Append(
         CreateError(kSecurityErrorName, kResponseFailedErrorMessage));
     SetResult(result);
     return false;
   }
 
   base::ListValue* result = new base::ListValue();
   SetResult(result);
   SendResponse(true);
   return true;
 }
 
 }  // namespace extensions