Allow extension APIs to be called from WebUI.

extensions/common/extension_api_stub.cc

 // Copyright 2013 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.
 
 // Stub methods to be used when extensions are disabled
 // i.e. ENABLE_EXTENSIONS is not defined
 
 #include "extensions/common/extension_api.h"
 
 #include "extensions/common/features/feature.h"
@@ skipping 23 matching lines @@
                                                   Feature::Context context,
                                                   const GURL& url) {
   return false;
 }
 
 bool ExtensionAPI::IsAvailableInUntrustedContext(const std::string& full_name,
                                                  const Extension* extension) {
   return false;
 }
 
+bool ExtensionAPI::IsAvailableToWebUI(const std::string& name) {
+  return false;
+}
+
 const base::DictionaryValue* ExtensionAPI::GetSchema(
     const std::string& full_name) {
   return NULL;
 }
 
 Feature* ExtensionAPI::GetFeatureDependency(const std::string& name) {
   return NULL;
 }
 
 }  // namespace extensions