Have content/ create and destroy its own threads.

chrome/browser/extensions/extension_info_map.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_info_map.h"
 
+#include <algorithm>
+
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_set.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 
 namespace {
 
 void CheckOnValidThread() {
@@ skipping 120 matching lines @@
   ExtensionSet::ExtensionMap::const_iterator i = extensions_.begin();
   for (; i != extensions_.end(); ++i) {
     if (i->second->web_extent().MatchesSecurityOrigin(origin) &&
         process_map_.Contains(i->first, process_id) &&
         i->second->HasAPIPermission(permission)) {
       return true;
     }
   }
   return false;
 }