0. Open WebInspector, switch to timeline panel 1. Start recording 2. Wait for a few pages worth of timeline events to be collected 3. Stop recording 4. Select a window in the middle of overview pane so that the events in window take more than one page in the lower pane 5. Try scrolling with two fingers over touch pad Note that if your hand is not steady enough to maintain scrolling along just one axis, you're probably observing somewhat counter-intuitive movement of records in the lower pane, since horizontal scrolling will affect the overview window and vertical scrolling will result in scrolling the set of records affected by horizontal scrolling. This appears quite irritating.
Created attachment 137154 [details] Patch
Committed r114270: <http://trac.webkit.org/changeset/114270>