[Webkit-unassigned] [Bug 181460] REGRESSION(r225650): The scores of MotionMark tests Multiply and Leaves dropped by 8%

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Jan 12 11:19:21 PST 2018


https://bugs.webkit.org/show_bug.cgi?id=181460

--- Comment #22 from Antti Koivisto <koivisto at iki.fi> ---
> I think that this is still changing the behavior when the document can't
> make requests to its own base URL (which is the case at least whenever there
> is a <base> element with a different origin URL, or for unique origins).

The purpose of this bit is to block access to stylesheet via getMatchedCSSRules legacy API in cases where it could not be accessed otherwise via DOM. As you can see from CSSStyleSheet::canAccessRules normal access is granted when the sheet base URL is empty. 

(There is also a cors related test that is missing here, not sure if it is relevant).

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