Typecheck media/PlayerPropertiesView.js with TypeScript
Typecheck media/PlayerPropertiesView.js with TypeScript

R=49f16de1701e9d27e09eb331529eeca82ecbab45@chromium.org

Bug: 1011811
Change-Id: I84a8e88b331222895bd7125fedadc4c61dc60789
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2510394
Reviewed-by: Ted Meyer <49f16de1701e9d27e09eb331529eeca82ecbab45@chromium.org>
Commit-Queue: Tim van der Lippe <dba8716ee7f8d16236046f74d2167cb94410f6ed@chromium.org>

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