Begin to enable extension APIs in Extension Service Worker.

third_party/WebKit/public/web/WebScriptController.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 27 matching lines @@
 }
 
 namespace blink {
 
 class WebScriptController {
 public:
     // Registers a v8 extension to be available on webpages. Will only affect
     // v8 contexts initialized after this call. Takes ownership of the
     // v8::Extension object passed.
     BLINK_EXPORT static void registerExtension(v8::Extension*);
+    // Same as registerExtension, but applies to Service Worker scripts.
+    BLINK_EXPORT static void registerExtensionForServiceWorkerScript(v8::Extension*);
 
 private:
     WebScriptController();
 };
 
 } // namespace blink
 
 #endif