[Mac] Allow fullscreen transitions while constrained windows are open.

chrome/browser/ui/tabs/tab_strip_model_utils.cc

 // Copyright (c) 2012 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/ui/tabs/tab_strip_model_utils.h"
 
 #include "chrome/browser/history/top_sites.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "content/public/browser/web_contents.h"
 
 namespace chrome {
 
-int IndexOfFirstBlockedTab(const TabStripModel* model) {
-  DCHECK(model);
-  for (int i = 0; i < model->count(); ++i) {
-    if (model->IsTabBlocked(i))
-      return i;
-  }
-  // No blocked tabs.
-  return model->count();
-}
-
 void GetOpenUrls(const TabStripModel& tabs,
                  const history::TopSites& top_sites,
                  std::set<std::string>* urls) {
   for (int i = 0; i < tabs.count(); ++i) {
     content::WebContents* web_contents = tabs.GetWebContentsAt(i);
     if (web_contents)
       urls->insert(top_sites.GetCanonicalURLString(web_contents->GetURL()));
   }
 }
 
 }  // namespace chrome