void UiSceneCreator::CreateViewportAwareRoot() {
  auto element = base::MakeUnique<ViewportAwareRoot>();
  element->SetName(kWebVrViewportAwareRoot);
  element->set_hit_testable(false);
  scene_->AddUiElement(kWebVrRoot, std::move(element));

  element = base::MakeUnique<ViewportAwareRoot>();
  element->SetName(k2dBrowsingViewportAwareRoot);
  element->set_hit_testable(false);
  scene_->AddUiElement(k2dBrowsingRoot, std::move(element));
}

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