It would be helpful for latched scrolling, if PlatformWheelEvent knew the momentum scroll phase of the event it was created from on the mac.
Created attachment 78762 [details] Patch
Landed in r75661.
Attachment 78762 [details] did not build on qt: Build output: http://queues.webkit.org/results/7583003
Attachment 78762 [details] did not build on win: Build output: http://queues.webkit.org/results/7490006
http://trac.webkit.org/changeset/75661 might have broken Leopard Intel Debug (Build) and SnowLeopard Intel Release (Build)