Mojo C++ bindings: Generate InterfaceHandle<> instead of InterfacePtr<>.

services/ui/view_manager/view_tree_host_impl.cc

Index: services/ui/view_manager/view_tree_host_impl.cc
diff --git a/services/ui/view_manager/view_tree_host_impl.cc b/services/ui/view_manager/view_tree_host_impl.cc
index bbfc208a1a53748e9637f65ca1b49a24f073433d..0cd80be1a28360265f25e697ebd3838332a6053b 100644
--- a/services/ui/view_manager/view_tree_host_impl.cc
+++ b/services/ui/view_manager/view_tree_host_impl.cc
@@ -28,8 +28,9 @@ void ViewTreeHostImpl::RequestLayout() {
   registry_->RequestLayout(state_);
 }
 
-void ViewTreeHostImpl::SetRoot(uint32_t root_key,
-                               mojo::ui::ViewOwnerPtr root_view_owner) {
+void ViewTreeHostImpl::SetRoot(
+    uint32_t root_key,
+    mojo::InterfaceHandle<mojo::ui::ViewOwner> root_view_owner) {
   registry_->SetRoot(state_, root_key, root_view_owner.Pass());
 }