shouldMerge       402 Source/core/editing/ReplaceSelectionCommand.cpp         && shouldMerge(startOfInsertedContent, prev);
shouldMerge       415 Source/core/editing/ReplaceSelectionCommand.cpp         && shouldMerge(endOfInsertedContent, next);
shouldMerge        84 Source/core/editing/ReplaceSelectionCommand.h     bool shouldMerge(const VisiblePosition&, const VisiblePosition&);