[chromium-reviews] Fix another crasher in Spell Checker related to file IO.

base/file_util.cc

 // Copyright (c) 2006-2008 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 "base/file_util.h"
 
 #include <stdio.h>
 
 #include <fstream>
 
@@ skipping 277 matching lines @@
 
 bool GetFileSize(const std::wstring& file_path, int64* file_size) {
   FileInfo info;
   if (!GetFileInfo(file_path, &info))
     return false;
   *file_size = info.size;
   return true;
 }
 
 bool CloseFile(FILE* file) {
+  if (file == NULL)
+    return true;
   return fclose(file) == 0;
 }
 
 }  // namespace