ensureRootTransformLayer  149 Source/core/rendering/compositing/RenderLayerCompositor.h     GraphicsLayer* ensureRootTransformLayer();
ensureRootTransformLayer 3549 Source/web/WebViewImpl.cpp         m_rootTransformLayer = m_page->mainFrame()->view()->renderView()->compositor()->ensureRootTransformLayer();
ensureRootTransformLayer 3880 Source/web/WebViewImpl.cpp         m_rootTransformLayer = m_page->mainFrame()->view()->renderView()->compositor()->ensureRootTransformLayer();