GitLab

The callbacks are overridden by WebTestProxy in layout tests, and layout tests should be the only times that they're called, so they're not useful anymore.

BUG=362164

Review URL: https://codereview.chromium.org/279373002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269975 0039d316-1c4b-4281-b951-d872f2087c98