Remove extension group from DOMWrapperWorld.

third_party/WebKit/Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 324 matching lines @@
     return ObjectContentType();
   }
 
   void didCreateNewDocument() override {}
   void dispatchDidClearWindowObjectInMainWorld() override {}
   void documentElementAvailable() override {}
   void runScriptsAtDocumentElementAvailable() override {}
   void runScriptsAtDocumentReady(bool) override {}
 
   void didCreateScriptContext(v8::Local<v8::Context>,
-                              int extensionGroup,
                               int worldId) override {}
   void willReleaseScriptContext(v8::Local<v8::Context>, int worldId) override {}
-  bool allowScriptExtension(const String& extensionName,
-                            int extensionGroup,
-                            int worldId) override {
-    return false;
-  }
+  bool allowScriptExtensions() override { return false; }
 
   WebCookieJar* cookieJar() const override { return 0; }
 
   std::unique_ptr<WebServiceWorkerProvider> createServiceWorkerProvider()
       override;
   bool isControlledByServiceWorker(DocumentLoader&) override { return false; }
   int64_t serviceWorkerID(DocumentLoader&) override { return -1; }
   std::unique_ptr<WebApplicationCacheHost> createApplicationCacheHost(
       WebApplicationCacheHostClient*) override;
 
@@ skipping 63 matching lines @@
   ~EmptyContextMenuClient() override {}
   bool showContextMenu(const ContextMenu*, bool) override { return false; }
   void clearContextMenu() override {}
 };
 
 CORE_EXPORT void fillWithEmptyClients(Page::PageClients&);
 
 }  // namespace blink
 
 #endif  // EmptyClients_h