Reify view ownership as a message pipe.

mojo/ui/ganesh_view.h

Index: mojo/ui/ganesh_view.h
diff --git a/mojo/ui/ganesh_view.h b/mojo/ui/ganesh_view.h
index 7cf29e93d2882863dc8a0ab67c3dd590a577c6b3..7f28e353b39ac199a5e0cb5dfd1acf0f2ceb9e2c 100644
--- a/mojo/ui/ganesh_view.h
+++ b/mojo/ui/ganesh_view.h
@@ -21,10 +21,9 @@ namespace ui {
 // content for the scene.
 class GaneshView : public BaseView {
  public:
-  GaneshView(
-      mojo::ApplicationImpl* app_impl,
-      const std::string& label,
-      const mojo::ui::ViewProvider::CreateViewCallback& create_view_callback);
+  GaneshView(mojo::ApplicationImpl* app_impl,
+             mojo::InterfaceRequest<mojo::ui::ViewOwner> view_owner_request,
+             const std::string& label);
 
   ~GaneshView() override;