Make it so that allow_js_access: false can be used with background pages created by window.open.

chrome/common/extensions/extension.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/common/extensions/extension.h"
 
 #include <algorithm>
 
 #include "base/base64.h"
 #include "base/basictypes.h"
@@ skipping 1816 matching lines @@
   Value* allow_js_access = NULL;
   if (!manifest_->Get(keys::kBackgroundAllowJsAccess, &allow_js_access))
     return true;
 
   if (!allow_js_access->IsType(Value::TYPE_BOOLEAN) ||
       !allow_js_access->GetAsBoolean(&allow_background_js_access_)) {
     *error = ASCIIToUTF16(errors::kInvalidBackgroundAllowJsAccess);
     return false;
   }
 
-  if (!has_background_page()) {
-    *error = ASCIIToUTF16(errors::kInvalidBackgroundAllowJsAccessNoPage);
-    return false;
-  }
-
   return true;
 }
 
 bool Extension::LoadWebIntentAction(const std::string& action_name,
                                     const DictionaryValue& intent_service,
                                     string16* error) {
   DCHECK(error);
   webkit_glue::WebIntentServiceData service;
   std::string value;
 
@@ skipping 1715 matching lines @@
     already_disabled(false),
     extension(extension) {}
 
 UpdatedExtensionPermissionsInfo::UpdatedExtensionPermissionsInfo(
     const Extension* extension,
     const ExtensionPermissionSet* permissions,
     Reason reason)
     : reason(reason),
       extension(extension),
       permissions(permissions) {}