GitLab

Watch for filtering pref changes in ManagedModeInterstitial and unblock requests if they become allowed.

BUG=283379

Review URL: https://chromiumcodereview.appspot.com/23533014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221442 0039d316-1c4b-4281-b951-d872f2087c98