IsInCanvasSubtree 1361 Source/core/dom/Element.cpp     clearElementFlag(IsInCanvasSubtree);
IsInCanvasSubtree  347 Source/core/dom/Element.h     void setIsInCanvasSubtree(bool value) { setElementFlag(IsInCanvasSubtree, value); }
IsInCanvasSubtree  348 Source/core/dom/Element.h     bool isInCanvasSubtree() const { return hasElementFlag(IsInCanvasSubtree); }