[Extensions OOPI] Update app window bindings for OOPI

extensions/renderer/render_view_observer_natives.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_RENDER_VIEW_OBSERVER_NATIVES_H_
-#define EXTENSIONS_RENDERER_RENDER_VIEW_OBSERVER_NATIVES_H_
-
-#include "extensions/renderer/object_backed_native_handler.h"
-
-namespace extensions {
-class ScriptContext;
-
-// Native functions for JS to run callbacks upon RenderView events.
-class RenderViewObserverNatives : public ObjectBackedNativeHandler {
- public:
-  RenderViewObserverNatives(ScriptContext* context);
-
- private:
-  // Runs a callback upon creation of new document element inside a render view
-  // (document.documentElement).
-  void OnDocumentElementCreated(
-      const v8::FunctionCallbackInfo<v8::Value>& args);
-  DISALLOW_COPY_AND_ASSIGN(RenderViewObserverNatives);
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_RENDERER_RENDER_VIEW_OBSERVER_NATIVES_H_