1024305 - Regression: no display the scrollbar area after mouseover on its area when apz is enabled

Status: RESOLVED DUPLICATE of bug 1013474

(Core :: Panning and Zooming, defect)

Description

[Tetsuharu OHZEKI [:tetsuharu] (UTC+9)]

Attachment: screenshot

# env
- OSX 10.9
- https://hg.mozilla.org/mozilla-central/rev/18c21532848a
- "layers.async-pan-zoom.enabled" is true

# abstraction
The current Gecko displays the "full" scrollbar like the screenshot, if we satisfy these situation:
  - No connected mouse device (on OSX).
  - Operate page scroll.
  - Mouse over on scroll bar area.

But if we set "layers.async-pan-zoom.enabled" is true, mouse over on scrollbar area after operating page scroll, Gecko does not display the "full" scrollbar.