Update from https://crrev.com/311076

base/test/test_file_util_win.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 "base/test/test_file_util.h"
 
 #include <windows.h>
 #include <aclapi.h>
 #include <shlwapi.h>
 
@@ skipping 231 matching lines @@
   if (!ReadFileToString(zone_path, &zone_path_contents))
     return false;
 
   std::vector<std::string> lines;
   // This call also trims whitespaces, including carriage-returns (\r).
   SplitString(zone_path_contents, '\n', &lines);
 
   switch (lines.size()) {
     case 3:
       // optional empty line at end of file:
-      if (lines[2] != "")
+      if (!lines[2].empty())
         return false;
       // fall through:
     case 2:
       return lines[0] == "[ZoneTransfer]" && lines[1] == "ZoneId=3";
     default:
       return false;
   }
 }
 
 bool MakeFileUnreadable(const FilePath& path) {
@@ skipping 10 matching lines @@
   DCHECK(info_ != NULL);
   DCHECK_NE(0u, length_);
 }
 
 FilePermissionRestorer::~FilePermissionRestorer() {
   if (!RestorePermissionInfo(path_, info_, length_))
     NOTREACHED();
 }
 
 }  // namespace base