Change default timestamp to 64 bits in all webrtc directories.

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 115 matching lines @@
 #endif
 }
 
 bool DirectoryIterator::OlderThan(int seconds) const {
   time_t file_modify_time;
 #if defined(WEBRTC_WIN)
   FileTimeToUnixTime(data_.ftLastWriteTime, &file_modify_time);
 #else
   file_modify_time = stat_.st_mtime;
 #endif
-  return TimeDiff(time(NULL), file_modify_time) >= seconds;
+  return time(NULL) - file_modify_time >= seconds;
 }
 
 FilesystemInterface* Filesystem::default_filesystem_ = NULL;
 
 FilesystemInterface *Filesystem::EnsureDefaultFilesystem() {
   if (!default_filesystem_) {
 #if defined(WEBRTC_WIN)
     default_filesystem_ = new Win32Filesystem();
 #else
     default_filesystem_ = new UnixFilesystem();
@@ skipping 128 matching lines @@
     version += 1;
     char version_base[MAX_PATH];
     sprintfn(version_base, arraysize(version_base), "%s-%u", basename.c_str(),
              version);
     path.SetBasename(version_base);
   }
   return true;
 }
 
 }  // namespace rtc