Add a preference to force enable the NaCl plugin as we transition to

chrome/browser/ui/webui/plugins_ui.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/ui/webui/plugins_ui.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 309 matching lines @@
       LoadDataResourceBytes(IDR_PLUGIN);
 }
 
 // static
 void PluginsUI::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterListPref(prefs::kPluginsPluginsList,
                           PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kPluginsEnabledInternalPDF,
                              false,
                              PrefService::UNSYNCABLE_PREF);
+  prefs->RegisterBooleanPref(prefs::kPluginsEnabledNaCl,
+                             false,
+                             PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kPluginsShowDetails,
                              false,
                              PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kPluginsShowSetReaderDefaultInfobar,
                              true,
                              PrefService::UNSYNCABLE_PREF);
 }