voice_search_ui: Simplify code for displaying Booleans.

voice_search_ui: Simplify code for displaying Booleans.

Adds wrapper function AddPairBool so each call site doesn't need to
provide a string "Yes" or "No".

BUG=503496
Committed: https://crrev.com/5cb2c2b99e9b882d15ef58a42e8a316fe80009e1
Cr-Commit-Position: refs/heads/master@{#335887}

[Matt Giuca, 2015-06-24 03:30:00]

mgiuca@chromium.org changed reviewers:
+ pkasting@chromium.org

[Matt Giuca, 2015-06-24 03:30:01]

Follow-up to https://codereview.chromium.org/1196243003/#msg12

[Peter Kasting, 2015-06-24 07:01:02]

LGTM

[Matt Giuca, 2015-06-24 07:54:27]

The CQ bit was checked by mgiuca@chromium.org

[commit-bot: I haz the power, 2015-06-24 07:55:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1203923002/1

[commit-bot: I haz the power, 2015-06-24 08:42:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-24 08:43:50]

Patchset 1 (id:??) landed as
https://crrev.com/5cb2c2b99e9b882d15ef58a42e8a316fe80009e1
Cr-Commit-Position: refs/heads/master@{#335887}