Revert of Pass the v8::Context through the willDestroyServiceWorkerContextOnWorkerThread event.

extensions/renderer/dispatcher.h

Index: extensions/renderer/dispatcher.h
diff --git a/extensions/renderer/dispatcher.h b/extensions/renderer/dispatcher.h
index fb1714d9fccc4f5e3f8e83729e557cf265e45bd2..428efd794a5d1afe9641ad81f7a59b3baa53ac28 100644
--- a/extensions/renderer/dispatcher.h
+++ b/extensions/renderer/dispatcher.h
@@ -102,9 +102,7 @@
                                 int world_id);
 
   // Runs on a different thread and should not use any member variables.
-  static void WillDestroyServiceWorkerContextOnWorkerThread(
-      v8::Local<v8::Context> v8_context,
-      const GURL& url);
+  static void WillDestroyServiceWorkerContextOnWorkerThread(const GURL& url);
 
   void DidCreateDocumentElement(blink::WebLocalFrame* frame);