[Webkit-unassigned] [Bug 100718] Invalidate non-composited content host when page scale factor changes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=100718





--- Comment #7 from James Robinson <jamesr at chromium.org>  2012-10-29 20:51:04 PST ---
(In reply to comment #5)
> This change is hard to test -- with layout tests you don't have enough control over paint timing, and with unit tests you can't check the pixels.  Moreover, the class of problem it's fixing will become moot when we transition to the page-scale-applied-in-compositor model (at which point we can test this stuff entirely in cc_unittests).  So unless you can suggest some straightforward way to test it, I'd argue we should land without test.

In a layout test you have 100% control over paint timing - the harness paints when you call testRunner.display() or when the test ends and at no other time.

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