gin: Add the concept of named and indexed interceptors.

gin/object_template_builder.h

 // 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.
 
 #ifndef GIN_OBJECT_TEMPLATE_BUILDER_H_
 #define GIN_OBJECT_TEMPLATE_BUILDER_H_
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/strings/string_piece.h"
@@ skipping 106 matching lines @@
                                      const T& getter, const U& setter) {
     return SetPropertyImpl(name,
                            CallbackTraits<T>::CreateTemplate(isolate_, getter),
                            CallbackTraits<U>::CreateTemplate(isolate_, setter));
   }
   template<typename T>
   ObjectTemplateBuilder& SetCallAsFunctionHandler(const T& callback) {
     CallbackTraits<T>::SetAsFunctionHandler(isolate_, template_, callback);
     return *this;
   }
+  ObjectTemplateBuilder& AddNamedPropertyInterceptor();
+  ObjectTemplateBuilder& AddIndexedPropertyInterceptor();
 
   v8::Local<v8::ObjectTemplate> Build();
 
  private:
   ObjectTemplateBuilder& SetImpl(const base::StringPiece& name,
                                  v8::Handle<v8::Data> val);
   ObjectTemplateBuilder& SetPropertyImpl(
       const base::StringPiece& name, v8::Handle<v8::FunctionTemplate> getter,
       v8::Handle<v8::FunctionTemplate> setter);
 
   v8::Isolate* isolate_;
 
   // ObjectTemplateBuilder should only be used on the stack.
   v8::Local<v8::ObjectTemplate> template_;
 };
 
 }  // namespace gin
 
 #endif  // GIN_OBJECT_TEMPLATE_BUILDER_H_