Introduce blink::ServiceProvider

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 d5754d75405afcd8b79b781b0e73166003bf4cb0..da9f3a32f01e84fc19702d9c89a9798b9fdedb23 100644
--- a/sky/viewer/document_view.cc
+++ b/sky/viewer/document_view.cc
@@ -182,6 +182,14 @@ void DocumentView::didCreateScriptContext(blink::WebLocalFrame* frame,
                          gin::ConvertToV8(isolate, internals));
 }
 
+blink::ServiceProvider* DocumentView::services() {
+  return this;
+}
+
+mojo::NavigatorHost* DocumentView::NavigatorHost() {
+  return navigator_host_.get();
+}
+
 void DocumentView::OnViewBoundsChanged(mojo::View* view,
                                        const mojo::Rect& old_bounds,
                                        const mojo::Rect& new_bounds) {