Classify navigations without page id in parallel to the existing classifier.
For now, this only happens in debug builds.
BUG=369661
TEST=NavigationControllerBrowserTest.NavigationTypeClassification_*
TEST=Every other test on the planet.
Committed: https://crrev.com/
d8d93348bbd8c646c337bdaa40fc0c64204fc5ff
Cr-Commit-Position: refs/heads/master@{#327122}
Reverted: https://crrev.com/
5348e920f4119aff9a4eb76c0965725dc85a66cc
Cr-Revert-Position: refs/heads/master@{#327152}
Review URL: https://codereview.chromium.org/
1002803002
Cr-Commit-Position: refs/heads/master@{#327214}