Pure pedantry: Replace all ".size() == 0" with ".empty()".

base/file_util_posix.cc

 // Copyright (c) 2010 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 <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <fnmatch.h>
@@ skipping 615 matching lines @@
     : current_directory_entry_(0),
       root_path_(root_path),
       recursive_(recursive),
       file_type_(file_type),
       pattern_(root_path.Append(pattern).value()) {
   // INCLUDE_DOT_DOT must not be specified if recursive.
   DCHECK(!(recursive && (INCLUDE_DOT_DOT & file_type_)));
   // The Windows version of this code appends the pattern to the root_path,
   // potentially only matching against items in the top-most directory.
   // Do the same here.
-  if (pattern.size() == 0)
+  if (pattern.empty())
     pattern_ = FilePath::StringType();
   pending_paths_.push(root_path);
 }
 
 FileEnumerator::~FileEnumerator() {
 }
 
 FilePath FileEnumerator::Next() {
   ++current_directory_entry_;
 
@@ skipping 234 matching lines @@
   if (HANDLE_EINTR(close(infile)) < 0)
     result = false;
   if (HANDLE_EINTR(close(outfile)) < 0)
     result = false;
 
   return result;
 }
 #endif  // defined(OS_MACOSX)
 
 }  // namespace file_util