Remove extension group from DOMWrapperWorld.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 120d55863df289c3d50cb2dcb642b2302a31b5b3..16517fdf7363993f4ad291ae27cc768ea8cd051c 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1996,7 +1996,7 @@ void RenderFrameImpl::OnJavaScriptExecuteRequestInIsolatedWorld(
   WebScriptSource script = WebScriptSource(jscript);
   JavaScriptIsolatedWorldRequest* request = new JavaScriptIsolatedWorldRequest(
       id, notify_result, routing_id_, weak_factory_.GetWeakPtr());
-  frame_->requestExecuteScriptInIsolatedWorld(world_id, &script, 1, 0, false,
+  frame_->requestExecuteScriptInIsolatedWorld(world_id, &script, 1, false,
                                               request);
 }
 
@@ -4458,12 +4458,11 @@ void RenderFrameImpl::didObserveLoadingBehavior(
 
 void RenderFrameImpl::didCreateScriptContext(blink::WebLocalFrame* frame,
                                              v8::Local<v8::Context> context,
-                                             int extension_group,
                                              int world_id) {
   DCHECK_EQ(frame_, frame);
 
   for (auto& observer : observers_)
-    observer.DidCreateScriptContext(context, extension_group, world_id);
+    observer.DidCreateScriptContext(context, world_id);
 }
 
 void RenderFrameImpl::willReleaseScriptContext(blink::WebLocalFrame* frame,