positionForPlatform 569 Source/core/editing/FrameSelection.cpp return positionForPlatform(true); positionForPlatform 574 Source/core/editing/FrameSelection.cpp return positionForPlatform(false); positionForPlatform 215 Source/core/editing/FrameSelection.h VisiblePosition positionForPlatform(bool isGetStart) const;