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

examples/ui/spinning_cube/spinning_cube_view.cc

Index: examples/ui/spinning_cube/spinning_cube_view.cc
diff --git a/examples/ui/spinning_cube/spinning_cube_view.cc b/examples/ui/spinning_cube/spinning_cube_view.cc
index fab02ecca76928fd31fdc5d3361500a2d422d0cb..9386b8853ce4dbd379c1778fe64ccfd742d4d405 100644
--- a/examples/ui/spinning_cube/spinning_cube_view.cc
+++ b/examples/ui/spinning_cube/spinning_cube_view.cc
@@ -54,9 +54,9 @@ int GetEventDirection(const mojo::PointF& current,
 }  // namespace
 
 SpinningCubeView::SpinningCubeView(
-    mojo::ApplicationImpl* app_impl,
+    mojo::InterfaceHandle<mojo::ApplicationConnector> app_connector,
     mojo::InterfaceRequest<mojo::ui::ViewOwner> view_owner_request)
-    : GLView(app_impl, view_owner_request.Pass(), "SpinningCube"),
+    : GLView(app_connector.Pass(), view_owner_request.Pass(), "SpinningCube"),
       choreographer_(scene(), this),
       input_handler_(GetViewServiceProvider(), this),
       weak_ptr_factory_(this) {