[Webkit-unassigned] [Bug 221391] [CoordinatedGraphics] The whole content is unnecessarily repainted by animations

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221391

--- Comment #1 from Fujii Hironori <Hironori.Fujii at sony.com> ---
Created attachment 419252

  --> https://bugs.webkit.org/attachment.cgi?id=419252&action=review

test case

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