NEW 198341
Need to call FrameView::updateTiledBackingAdaptiveSizing() for scrollable iframes 
https://bugs.webkit.org/show_bug.cgi?id=198341
Summary Need to call FrameView::updateTiledBackingAdaptiveSizing() for scrollable ifr...
Simon Fraser (smfr)
Reported 2019-05-29 10:39:11 PDT
We never call FrameView::updateTiledBackingAdaptiveSizing() on scrollable iframe, so we don't pick a good tile size for them like we do the main frame.
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