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

chrome/browser/chromeos/network_message_observer.cc

 // Copyright (c) 2011 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 "chrome/browser/chromeos/network_message_observer.h"
 
 #include "base/callback.h"
 #include "base/stl_util-inl.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
@@ skipping 212 matching lines @@
     return;
   }
 
   const CellularNetwork* cellular = cros->cellular_network();
   if (!cellular)
     return;
   const CellularDataPlanVector* plans =
       cros->GetDataPlans(cellular->service_path());
 
   // If no plans available, check to see if we need a new plan.
-  if (!plans || plans->size() == 0) {
+  if (!plans || plans->empty()) {
     // If previously, we had a low data notification, we know that a plan was
     // near expiring. In that case, because the plan has disappeared, we assume
     // that it expired.
     // Note: even if a user dismissed the notification, it's still visible.
     if (notification_low_data_.visible()) {
       ShowNoDataNotification(cellular_data_plan_type_);
     } else if (cellular->needs_new_plan()) {
       ShowNeedsPlanNotification(cellular);
     }
     return;
@@ skipping 31 matching lines @@
   cellular_data_plan_type_ = current_plan->plan_type;
 }
 
 void NetworkMessageObserver::OnConnectionInitiated(NetworkLibrary* obj,
                                                    const Network* network) {
   // If user initiated any network connection, we hide the error notification.
   notification_connection_error_.Hide();
 }
 
 }  // namespace chromeos