Reland of Enable GN check for webrtc/base

webrtc/base/pathutils.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.
  */
 
 #if defined(WEBRTC_WIN)
 #include "webrtc/base/win32.h"
 #include <shellapi.h>
 #include <shlobj.h>
 #include <tchar.h>
 #endif  // WEBRTC_WIN
 
 #include "webrtc/base/checks.h"
-#include "webrtc/base/fileutils.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/pathutils.h"
 #include "webrtc/base/stringutils.h"
 
 namespace rtc {
 
 static const char EMPTY_STR[] = "";
 
 // EXT_DELIM separates a file basename from extension
 const char EXT_DELIM = '.';
@@ skipping 151 matching lines @@
   if ((pos == std::string::npos) || (pos == 0)) {
     return SetExtension(EMPTY_STR) && SetBasename(filename);
   } else {
     return SetExtension(filename.substr(pos)) && SetBasename(filename.substr(0, pos));
   }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 } // namespace rtc