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

chrome/installer/util/delete_after_reboot_helper.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.
 //
 // This file defines helper methods used to schedule files for deletion
 // on next reboot. The code here is heavily borrowed and simplified from
 //  http://code.google.com/p/omaha/source/browse/trunk/common/file.cc and
 //  http://code.google.com/p/omaha/source/browse/trunk/common/utils.cc
 //
 // This implementation really is not fast, so do not use it where that will
@@ skipping 177 matching lines @@
     }
   }
   return S_OK;
 }
 
 void StringArrayToMultiSZBytes(const std::vector<PendingMove>& strings,
                                std::vector<char>* buffer) {
   DCHECK(buffer);
   buffer->clear();
 
-  if (strings.size() == 0) {
+  if (strings.empty()) {
     // Leave buffer empty if we have no strings.
     return;
   }
 
   size_t total_wchars = 0;
   {
     std::vector<PendingMove>::const_iterator iter(strings.begin());
     for (; iter != strings.end(); ++iter) {
       total_wchars += iter->first.length();
       total_wchars++;  // Space for the null char.
@@ skipping 174 matching lines @@
         ERROR_SUCCESS);
   }
   std::vector<char> buffer;
   StringArrayToMultiSZBytes(strings_to_keep, &buffer);
   DCHECK_GT(buffer.size(), 0U);
   if (buffer.empty())
     return false;
   return (session_manager_key.WriteValue(kPendingFileRenameOps, &buffer[0],
       buffer.size(), REG_MULTI_SZ) == ERROR_SUCCESS);
 }