[lottie-web-perf] Command line application to measure perf

Uses puppeteer to bring up Chrome headless and then calls lottie-web-perf.html with endpoints for lottie.min.js and the target lottie file.

NoTry: true
Bug: skia:9187
Change-Id: Ic1f4c9fc1cd68b3f747e58bdbf1ea51387e5e139
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/221717
Commit-Queue: Ravi Mistry <rmistry@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
4 files changed