Change other usages of .size() to .empty() when applicable.

jingle/notifier/communicator/connection_settings.cc

 // Copyright (c) 2009 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 <algorithm>
 #include <deque>
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 60 matching lines @@
         continue;
       }
       iplist_seen_.push_back(iplist_random[index]);
       server.SetResolvedIP(iplist_random[index]);
       PermuteForAddress(server, special_port_magic, try_ssltcp_first,
                         &list_temp);
     }
   }
 
   // Add this list to the instance list
-  while (list_temp.size() != 0) {
+  while (!list_temp.empty()) {
     list_.push_back(list_temp[0]);
     list_temp.pop_front();
   }
 }
 
 
 void ConnectionSettingsList::PermuteForAddress(
     const talk_base::SocketAddress& server,
     bool special_port_magic,
     bool try_ssltcp_first,
@@ skipping 10 matching lines @@
     settings.set_protocol(cricket::PROTO_SSLTCP);
     settings.mutable_server()->SetPort(443);
     if (try_ssltcp_first) {
       list_temp->push_front(settings);
     } else {
       list_temp->push_back(settings);
     }
   }
 }
 }  // namespace notifier