This CL sync the timeline-tracks positions
upon receiving a horizontal scrolling event.

Bug: v8:10644

Change-Id: I69bc1066a3f5da6ddc978ad71fe77820df8066bd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2336806
Commit-Queue: Zeynep Cankara <zcankara@google.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69263}