This CL adds drag handlers to the timeline panel
to filter events based on the selected portion
of the timeline tracks.

Bug: v8:10644
Change-Id: Ic8a38493eacb62844b3fed5a027f8b1367f2bb59
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2346275
Commit-Queue: Zeynep Cankara <zcankara@google.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69669}