Fix dart:sky.internals to work in SkyView

sky/viewer/document_view.cc

Index: sky/viewer/document_view.cc
diff --git a/sky/viewer/document_view.cc b/sky/viewer/document_view.cc
index e8eda02094c09d9f14c7547684121ce2270cdf3f..b546f568c267311ff08732e43d5d7dfaa1422991 100644
--- a/sky/viewer/document_view.cc
+++ b/sky/viewer/document_view.cc
@@ -322,6 +322,10 @@ void DocumentView::didCreateIsolate(blink::WebLocalFrame* frame,
   Internals::Create(isolate, this);
 }
 
+void DocumentView::DidCreateIsolate(Dart_Isolate isolate) {
+  Internals::Create(isolate, this);
+}
+
 blink::ServiceProvider* DocumentView::services() {
   return this;
 }