[Webkit-unassigned] [Bug 81954] [Chromium] Using WebViewPlugins with --force-compositing-mode causes an ASSERT to fail

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=81954





--- Comment #7 from James Robinson <jamesr at chromium.org>  2012-03-22 14:24:59 PST ---
It's very important for the normal case where there's one compositing tree in the process and mutating it is a sign of either concurrent access from multiple threads (always bad) or something mutating layout inside a WebView while that WebView is being painted.

You could make this restriction per-WebView if you wanted isolation here.  I would not be OK with turning the ASSERT() off completely, it's helped us catch many other bugs.

Or just do layout inside the WebView at the same time inside the WebViewPlugin as outside the WebView if you are painting them in lockstep, which it appears from this callstack that you are.

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