previousSelectableListIndex  588 Source/core/html/HTMLSelectElement.cpp     setActiveSelectionEndIndex(previousSelectableListIndex(-1));
previousSelectableListIndex 1428 Source/core/html/HTMLSelectElement.cpp                     endIndex = previousSelectableListIndex(startIndex);
previousSelectableListIndex 1438 Source/core/html/HTMLSelectElement.cpp                 endIndex = previousSelectableListIndex(m_activeSelectionEndIndex);
previousSelectableListIndex  185 Source/core/html/HTMLSelectElement.h     int previousSelectableListIndex(int startIndex) const;