GitLab

Makes the first (and thus fatal) failure from JavaScript more clear in
the XR browser tests. This is achieved by adding logging to point the
user towards the failure and stack that are actually useful for
debugging.

This is a workaround for a limitation of browser tests in general.
FAIL() and other fatal macros provided by gtest only abort the current
function. Since all the JavaScript execution is handled by helper
functions, this means that even if we catch a failure in JavaScript and
report it as a failure, the browser test will continue to run. This can
then cause debugging issues because errors/stack traces from later on in
the test end up getting printed as well since the test is continuing to
run in a bad state.

Bug: 961378
Change-Id: Iafd4892dc7d5307fa35848a855d5f1c76bd27095
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1605340
Auto-Submit: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Bill Orr <billorr@chromium.org>
Reviewed-by: Bill Orr <billorr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658773}