isVerticalDocument  338 Source/core/frame/FrameView.h     virtual bool isVerticalDocument() const OVERRIDE;
isVerticalDocument  296 Source/platform/scroll/ScrollView.cpp         toPhysicalDirection(direction, isVerticalDocument(), isFlippedDocument());
isVerticalDocument  281 Source/platform/scroll/ScrollView.h     virtual bool isVerticalDocument() const { return true; }