[Extensions] Add an access check before executing native code in the renderer

extensions/renderer/object_backed_native_handler.h

 // Copyright 2014 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.
 
 #ifndef EXTENSIONS_RENDERER_OBJECT_BACKED_NATIVE_HANDLER_H_
 #define EXTENSIONS_RENDERER_OBJECT_BACKED_NATIVE_HANDLER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 27 matching lines @@
 
   // Installs a new 'route' from |name| to |handler_function|. This means that
   // NewInstance()s of this ObjectBackedNativeHandler will have a property
   // |name| which will be handled by |handler_function|.
   //
   // Routed functions are destroyed along with the destruction of this class,
   // and are never called back into, therefore it's safe for |handler_function|
   // to bind to base::Unretained.
   void RouteFunction(const std::string& name,
                      const HandlerFunction& handler_function);
+  void RouteFunction(const std::string& name,
+                     const std::string& feature_name,
+                     const HandlerFunction& handler_function);
 
   ScriptContext* context() const { return context_; }
 
   void Invalidate() override;
 
   // The following methods are convenience wrappers for methods on v8::Object
   // with the corresponding names.
   void SetPrivate(v8::Local<v8::Object> obj,
                   const char* key,
                   v8::Local<v8::Value> value);
@@ skipping 37 matching lines @@
   ScriptContext* context_;
 
   v8::Global<v8::ObjectTemplate> object_template_;
 
   DISALLOW_COPY_AND_ASSIGN(ObjectBackedNativeHandler);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_OBJECT_BACKED_NATIVE_HANDLER_H_