SAN DIEGO — A small but emotional memorial is growing at the Dana Landing/Sunset Point area of Mission Bay, where a baby boy died after being found inside a portable restroom Monday afternoon. Flowers, balloons, and a sympathy card now sit at the base of the restroom, placed there by people who never knew the child but say they felt compelled to honor him. On Tuesday, the site became a place of quiet mourning. A small group gathered for a prayer, asking for comfort for the baby and his family.