[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 #4 from Fady Samuel <fsamuel at chromium.org>  2012-03-22 14:15:14 PST ---
(In reply to comment #3)
> To expand a bit, WebViewPlugin is a WebPlugin implementation that forwards drawing and input event handling to a separate WebView, to allow us to draw plug-in placeholders in HTML. The inner WebView is by design completely independent from the outer one (from the point of view of the outer one, it's just a plug-in), so it shouldn't be a problem that we call layout() on the inner one during paint() in the outer one. WebPlugin also doesn't have a layout() method, so we can't call layout() on the inner WebView when the outer one is being layouted.
> 
> Is the crash caused by the two RenderViews somehow sharing graphics layers? If so, maybe that's what we should prevent.

The problem here is s_inPaintContents is a static variable that's shared between the two WebView instances. One WebView is painting while the other is laying out.

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