Disable tests for DevTools migration

R=rubber-stamper@appspot.gserviceaccount.com, tvanderlippe@chromium.org

Bug: chromium:1207342
Change-Id: I7ef0e790c7350d031a4b004298ff22094e016d55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3086682
Auto-Submit: Jan Scheffler <janscheffler@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#910495}