This CL adds a source code panel to display source code positions of
Map/IC log events.

* Clicking file positions on the Ic Panel emits FocusEvent with
SourcePositionLogEvent as entry to highlight code related with the
selected icLogEvent.

* Clicking map details on the Map Panel emits FocusEvent with
SourcePositionLogEvent as entry to highlight code related with the
selected mapLogEvent.

Bug: v8:10644
Change-Id: Icaf3e9e3f7fae485c50ad685f9ec5dc8ac28b3dc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2358734
Commit-Queue: Zeynep Cankara <zcankara@google.com>
Reviewed-by: Sathya Gunasekaran  <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69610}