Revert "Clear image descs on Impl errors." Didn't fix the crash, and the crash experiment is complete. BUG=485543 This reverts commit 9674850737bd3e7f44fdc9d1ddc42fffd76f2997. Change-Id: If7d97901b87506bf306ab5558575d0413c76cb68 Reviewed-on: https://chromium-review.googlesource.com/272150 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>