[Webkit-unassigned] [Bug 78175] [Chromium] Layout Test compositing/overflow/overflow-scaled-descendant-overlapping.html is failing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=78175


James Robinson <jamesr at chromium.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |asvitkine at chromium.org,
                   |                            |backer at chromium.org,
                   |                            |enne at google.com,
                   |                            |jamesr at chromium.org,
                   |                            |skyostil at google.com,
                   |                            |vangelis at chromium.org




--- Comment #2 from James Robinson <jamesr at chromium.org>  2012-02-09 14:00:51 PST ---
This test scales the page down to cover 1/4 of the viewport.  Previously, since we set backgroundCoversViewport on the root layer we would draw the background color of the document over the whole viewport.  Alexei recently disabled this behavior on Mac in http://trac.webkit.org/changeset/107094/ in order to handle painting behind the viewport for rubber banding.  Jonathan also recently disabled viewport clears in release builds.

As a result, in debug you see the compositor blue color over most of the viewport.  In release, there's no clear so many pixels are in a poorly defined state.

I think this current situation kind of sucks.  Suggestions?

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