[Shadow] Performance tests for ShadowDOM distribution
https://bugs.webkit.org/show_bug.cgi?id=103617

Reviewed by Dimitri Glazkov.

We would like to measure ShadowDOM distribution performance in various cases.
In this patch, we add performance tests for several distribution patterns.

* ShadowDOM/ContentReprojection.html: Added.
* ShadowDOM/DistributionWithMultipleShadowRoots.html: Added.
* ShadowDOM/LargeDistributionWithLayout.html: Added.
* ShadowDOM/MultipleInsertionPoints.html: Added.
* ShadowDOM/ShadowReprojection.html: Added.
* ShadowDOM/SmallDistributionWithLayout.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@136805 268f45cc-cd09-0410-ab3c-d52691b4dbfc
7 files changed