[chrome:omnibox] Render additional properties as key value pairs (i.e. `last visit: 48 hours`).

Previously, the additional properties column was rendered as stringified JSON [1]. Using colon-delimited key value strings [2] improves readability and saves >75% vertical space.

[1]
[
  {
    "key": "last visit",
    "value": "48 hours ago"
  },
  {
    "key": "typed count",
    "value": "36"
  },
  {
    "key": "visit count",
    "value": "36"
  }
]

[2]
last visit: 48 hours ago
typed count: 36
visit count: 36

Bug: 891303
Change-Id: I4630347e2806cc8deb434f80c20b1587cf06c989
Reviewed-on: https://chromium-review.googlesource.com/c/1340946
Commit-Queue: manuk hovanesian <manukh@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611446}
1 file changed