Tab.NewTabOnload histogram: Remove .LocalGoogle vs .LocalOther split

This essentially reverts crrev.com/2897523004. The split introduced
there doesn't work: The "Google vs. non-Google" check is based on the
URL, but the local NTP URL is always the same.

Bug: 583292
Change-Id: Ia7854a0c694c11d86ebaa853849a29e04dd81dde
Reviewed-on: https://chromium-review.googlesource.com/527794
Reviewed-by: Chris Pickel <sfiera@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Commit-Queue: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#478632}
2 files changed