SelectionDragPolicy  621 Source/core/page/DragController.cpp Node* DragController::draggableNode(const LocalFrame* src, Node* startNode, const IntPoint& dragOrigin, SelectionDragPolicy selectionDragPolicy, DragSourceAction& dragType) const
SelectionDragPolicy   70 Source/core/page/DragController.h         Node* draggableNode(const LocalFrame*, Node*, const IntPoint&, SelectionDragPolicy, DragSourceAction&) const;
SelectionDragPolicy 3313 Source/core/page/EventHandler.cpp             DragController::SelectionDragPolicy selectionDragPolicy = event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay