[webkit-reviews] review requested: [Bug 105394] Fix regression from r137923 that caused all tiles to paint when scrolling : [Attachment 180101] Patch

[bugzilla-daemon at webkit.org]

Simon Fraser (smfr) <simon.fraser at apple.com> has asked	for review:
Bug 105394: Fix regression from r137923 that caused all tiles to paint when
scrolling
https://bugs.webkit.org/show_bug.cgi?id=105394

Attachment 180101: Patch
https://bugs.webkit.org/attachment.cgi?id=180101&action=review