GitLab

They don't need to run in Chrome's unit_tests suite any more.

The tests that depend on Chrome's version channel information move to
ChromeChannelFeatureFilterTest.

BUG=413319,397165
TEST=unit_tests ChromeChannelFeatureFilterTest.* and extensions_unittests

Review URL: https://codereview.chromium.org/563923004

Cr-Commit-Position: refs/heads/master@{#294627}