We want to break calls of ComputeInlineBoxPosition as follows:

Before breaking:

box_position = ComputeInlineBoxPosition(position);

After breaking:

adjusted = ComputeInlineAdjustedPosition(position);
// Alternative implementation for LayoutNG
box_position = ComputeInlineBoxPositionForInlineAdjustedPosition(adjusted);

However, to ensure no behavior change in the above refactoring, |position| and |adjusted| must have the same primary direction because ComputeInlineBoxPosition() passes the primary direction of |position| into ComputeInlineBoxPositionForInlineAdjustedPosition().

We should identify all callers of ComputeInlineBoxPositionForInlineAdjustedPosition using a wrong primary direction, do investigation and try to eliminate them.

Two known callers are SelectionModifier's LeftPositionOf() and RightPositionOf().