Refactor FileIO to the new design

ppapi/tests/test_url_loader.cc

 // Copyright (c) 2012 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 "ppapi/tests/test_url_loader.h"
 
 #include <stdio.h>
 #include <string.h>
 #include <string>
 
@@ skipping 438 matching lines @@
   std::string error = ReadEntireFile(&reader, &data);
   if (!error.empty())
     return error;
 
   std::string expected_body = "hello\n";
   if (data.size() != expected_body.size())
     return "ReadEntireFile returned unexpected content length";
   if (data != expected_body)
     return "ReadEntireFile returned unexpected content";
 
-  // FileIOTrusted is not supported by NaCl or ppapi/proxy.
-  if (!testing_interface_->IsOutOfProcess()) {
-#if !(defined __native_client__)
-    int32_t file_descriptor = file_io_trusted_interface_->GetOSFileDescriptor(
-        reader.pp_resource());
-    if (file_descriptor < 0)
-      return "FileIO::GetOSFileDescriptor() returned a bad file descriptor.";
-#endif
-  }
   PASS();
 }
 
 // Untrusted, unintended cross-origin requests should fail.
 std::string TestURLLoader::TestUntrustedSameOriginRestriction() {
   pp::URLRequestInfo request(instance_);
   std::string cross_origin_url = GetReachableCrossOriginURL("test_case.html");
   request.SetURL(cross_origin_url);
 
   int32_t rv = OpenUntrusted(request);
@@ skipping 358 matching lines @@
   if (rv != PP_ERROR_FAILED) {
     return ReportError("The lower buffer value was higher than the upper but "
                        "the URLLoader did not fail.", rv);
   }
 
   PASS();
 }
 
 // TODO(viettrungluu): Add tests for  Get{Upload,Download}Progress, Close
 // (including abort tests if applicable).