Remove CHROME_EG_ASSERT_NO_ERROR usage from tab_usage_recorder_test_util.mm

Local helpers can assert inside. Existance of CHROME_EG_ASSERT_NO_ERROR
will not prevent people from asserting outside of the tests.

Bug: 963613
Change-Id: I13230d5ab79eaac442055f22bf069cfc28dedcda
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1658636
Auto-Submit: Eugene But <eugenebut@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Eugene But <eugenebut@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#669393}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: d6b68f0edf7c64090710b752ef91229e9319c2da
3 files changed