Try to consistently use arraysize() with strlcpy().

base/file_util_posix.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 <errno.h>
 #include <fcntl.h>
 #include <fnmatch.h>
 #include <fts.h>
@@ skipping 442 matching lines @@
       return FilePath();
 
     // The last find FindFirstFile operation is done, prepare a new one.
     root_path_ = pending_paths_.top();
     root_path_ = root_path_.StripTrailingSeparators();
     pending_paths_.pop();
 
     // Start a new find operation.
     int ftsflags = FTS_LOGICAL;
     char top_dir[PATH_MAX];
-    base::strlcpy(top_dir, root_path_.value().c_str(), sizeof(top_dir));
+    base::strlcpy(top_dir, root_path_.value().c_str(), arraysize(top_dir));
     char* dir_list[2] = { top_dir, NULL };
     fts_ = fts_open(dir_list, ftsflags, NULL);
     if (!fts_)
       return Next();
     is_in_find_op_ = true;
   }
 
   fts_ent_ = fts_read(fts_);
   if (fts_ent_ == NULL) {
     fts_close(fts_);
@@ skipping 60 matching lines @@
     munmap(data_, length_);
   if (file_ != -1)
     close(file_);
 
   data_ = NULL;
   length_ = 0;
   file_ = -1;
 }
 
 } // namespace file_util