isValidForPosition  207 Source/core/page/DOMSelection.cpp     if (!isValidForPosition(node))
isValidForPosition  266 Source/core/page/DOMSelection.cpp     if (!isValidForPosition(baseNode) || !isValidForPosition(extentNode))
isValidForPosition  345 Source/core/page/DOMSelection.cpp     if (!isValidForPosition(node))
isValidForPosition  109 Source/core/page/DOMSelection.h     bool isValidForPosition(Node*) const;