Make BaseView et al. take an ApplicationConnector instead of an ApplicationImpl.

examples/shadows/shadows_view.h

Index: examples/shadows/shadows_view.h
diff --git a/examples/shadows/shadows_view.h b/examples/shadows/shadows_view.h
index 893dfad3fef62b8daeece921b944c502c26661d1..e5e49a015cf79c33219be25189a20c866bd08d97 100644
--- a/examples/shadows/shadows_view.h
+++ b/examples/shadows/shadows_view.h
@@ -16,7 +16,7 @@ namespace examples {
 class ShadowsView : public mojo::ui::GLView,
                     public mojo::ui::ChoreographerDelegate {
  public:
-  ShadowsView(mojo::ApplicationImpl* app_impl,
+  ShadowsView(mojo::InterfaceHandle<mojo::ApplicationConnector> app_connector,
               mojo::InterfaceRequest<mojo::ui::ViewOwner> view_owner_request);
 
   ~ShadowsView() override;