Omnibox UI Experiments: Add match_in_foo to Bookmarks and Navsuggest

This CL adds a unified match_in_foo implementation for use between
HistoryURLProvider, Bookmarks, and Navsuggest.

It deliberately leaves off HQP, as that has does tricky operations
using adjusted match offsets rather than unadjusted (like the other
providers). It should be very posible to refactor HQP to use this
unified code as well, but that should be saved for a separate CL.

Bug: 761505
Change-Id: I8107915cae0ef6477e18de32fd924c2a9506e2ad
Reviewed-on: https://chromium-review.googlesource.com/661884


Commit-Queue: Tommy Li <tommycli@chromium.org>
Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501358}