[webkit-reviews] review requested: [Bug 52612] Apply feature flags to user-agent style sheets : [Attachment 89167] Patch 6

[bugzilla-daemon at webkit.org]

Kent Tamura <tkent at chromium.org> has asked  for review:
Bug 52612: Apply feature flags to user-agent style sheets
https://bugs.webkit.org/show_bug.cgi?id=52612

Attachment 89167: Patch 6
https://bugs.webkit.org/attachment.cgi?id=89167&action=review

------- Additional Comments from Kent Tamura <tkent at chromium.org>
Add Google copyright, rebase