[chrome:omnibox] Highlight specific cells when filtering.

Currently, we highlighted only the rows that matched. Sometimes, rows it would be unclear why some rows matched and were highlighted; e.g. if you're filtering for `goo` with the intention of finding `google` urls, and some match had a url `go.com/o`, it would match and be highlighted. Highlighing the specific cell helps identify which specific cells of a row actually matched.

Bug: 891303
Change-Id: I99965255c386aecb6b49f85bf989159716209bb5
Reviewed-on: https://chromium-review.googlesource.com/c/1364157
Commit-Queue: manuk hovanesian <manukh@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614707}
2 files changed