Correct flowThreadTranslationAtOffset() for vertical-rl writing mode.
The problem was that a rectangle was shifted by offsetFromColumnSet() after
having been made physical. However, offsetFromColumnSet() is semi-logical
(flipped block direction coordinate, like e.g. LayoutBox::m_frameRect), so we
need to add it in before flipping the rectangle.
This caused all fragmentainer groups but the first one to be translated
incorrectly.
Review-Url: https://codereview.chromium.org/2344813003
Cr-Commit-Position: refs/heads/master@{#418870}
3 files changed
