Remove extension group from DOMWrapperWorld.

extensions/renderer/dispatcher.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_DISPATCHER_H_
 #define EXTENSIONS_RENDERER_DISPATCHER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 69 matching lines @@
   const std::string& webview_partition_id() { return webview_partition_id_; }
 
   bool activity_logging_enabled() const { return activity_logging_enabled_; }
 
   void OnRenderFrameCreated(content::RenderFrame* render_frame);
 
   bool IsExtensionActive(const std::string& extension_id) const;
 
   void DidCreateScriptContext(blink::WebLocalFrame* frame,
                               const v8::Local<v8::Context>& context,
-                              int extension_group,
                               int world_id);
 
   // Runs on a different thread and should only use thread safe member
   // variables.
   void DidInitializeServiceWorkerContextOnWorkerThread(
       v8::Local<v8::Context> v8_context,
       int64_t service_worker_version_id,
       const GURL& url);
 
   void WillReleaseScriptContext(blink::WebLocalFrame* frame,
@@ skipping 189 matching lines @@
   // if this renderer is a WebView guest render process. Otherwise, this will be
   // empty.
   std::string webview_partition_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_DISPATCHER_H_