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

chrome/browser/extensions/extension_tabs_module.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/extensions/extension_tabs_module.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 460 matching lines @@
     }
   }
 
   Browser* new_window = Browser::CreateForType(window_type, window_profile);
   for (std::vector<GURL>::iterator i = urls.begin(); i != urls.end(); ++i)
     new_window->AddSelectedTabWithURL(*i, PageTransition::LINK);
   if (contents) {
     TabStripModel* target_tab_strip = new_window->tabstrip_model();
     target_tab_strip->InsertTabContentsAt(urls.size(), contents,
                                           TabStripModel::ADD_NONE);
-  } else if (urls.size() == 0) {
+  } else if (urls.empty()) {
     new_window->NewTab();
   }
   new_window->SelectNumberedTab(0);
   if (window_type & Browser::TYPE_POPUP)
     new_window->window()->SetBounds(popup_bounds);
   else
     new_window->window()->SetBounds(window_bounds);
   new_window->window()->Show();
 
   if (new_window->profile()->IsOffTheRecord() && !include_incognito()) {
@@ skipping 789 matching lines @@
 }
 
 static GURL ResolvePossiblyRelativeURL(std::string url_string,
                                        const Extension* extension) {
   GURL url = GURL(url_string);
   if (!url.is_valid())
     url = extension->GetResourceURL(url_string);
 
   return url;
 }