Disable dev channel crashes for Extension JS exceptions.

This is a temporary patch so that the next dev release branch won't have high
crash rates due to this bug. The crash is explicitly disabled on stable and
beta branches anyway. Once dev next branches, this will be reverted as we
return to trying to fix it.


Review URL: https://codereview.chromium.org/1059383002

Cr-Commit-Position: refs/heads/master@{#323841}
1 file changed