Add 'disable-gpu' flag when launching chrome binary for running tests
Add 'disable-gpu' flag when launching chrome binary for running tests

The windows bot would previously freeze on Puppeteer's
'browser.newPage()'. This can be avoided by launching Chrome with the
'disable-gpu' flag.

Bug: 1197532
Change-Id: Ia9912adf6f110520702ce09c69b59555a52d54e5
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2822638
Reviewed-by: Tim van der Lippe <dba8716ee7f8d16236046f74d2167cb94410f6ed@chromium.org>
Commit-Queue: Wolfgang Beyer <573aa99bb19da47d816981118f95c945310dd3f4@chromium.org>

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