GitLab

The "RelaxIsolatedWorldCorsInFileUrlLoaderFactory" feature was
introduced in r740899 in Q1 2020 just in case more extensions encounter
https://crbug.com/1049604 forcing us to revert to the old behavior.
This never happened and the feature was never enabled (and we don't have
any plans of using this feature in the future - quite the opposite, we
want to keep the feature disabled).

Based on the above this CL removes the feature (~reverting r740899).

Bug: 1049604
Change-Id: I4e2c2b61965661e61c75fd8cf7878715da4882d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2466511Reviewed-by: Charlie Reis <creis@chromium.org>
Commit-Queue: Łukasz Anforowicz <lukasza@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817309}