Add Types for Toolbar events
Add Types for Toolbar events

Bug: chromium:1228674
Change-Id: I453c9c1499ed3e0ae91bbf40865b620a0b530a01
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3067434
Reviewed-by: Simon Zünd <38944668e9e2ca98ccd0275b53370f90fa55c113@chromium.org>
Commit-Queue: Sigurd Schneider <f04d242e109628a27a0f75fd49a87722bcf291fd@chromium.org>

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