superreview canceled: [Bug 361545] Last line not selected when dragging downwards to following whitespace, in certain cases of Bidi with letter-spacing, word-spacing, etc.

Robert O'Callahan <roc@ocallahan.org> has canceled Uri Bernstein (Google)
<uriber@gmail.com>'s request for superreview:
Bug 361545: Last line not selected when dragging downwards to following
whitespace, in certain cases of Bidi with letter-spacing, word-spacing, etc.
https://bugzilla.mozilla.org/show_bug.cgi?id=361545
Attachment 246320: patch (diff -w)
https://bugzilla.mozilla.org/attachment.cgi?id=246320&action=edit