Delete Filesystem::IterateDirectory and Filesystem::OpenFile.

webrtc/base/fileutils.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 112 matching lines @@
   if (!default_filesystem_) {
 #if defined(WEBRTC_WIN)
     default_filesystem_ = new Win32Filesystem();
 #else
     default_filesystem_ = new UnixFilesystem();
 #endif
   }
   return default_filesystem_;
 }
 
-DirectoryIterator* FilesystemInterface::IterateDirectory() {
-  return new DirectoryIterator();
-}
-
 }  // namespace rtc