linux: Cache families from FontRenderParams queries.

linux: Cache families from FontRenderParams queries.

Cache results from FontRenderParams queries that request
font families. Previously, only family-less queries were
cached.

BUG=chromium:424082
Committed: https://crrev.com/265af2d41669ac68001f192ac6f72a359f58a7dc
Cr-Commit-Position: refs/heads/master@{#299980}

[Daniel Erat, 2014-10-16 16:02:46]

derat@chromium.org changed reviewers:
+ kochi@chromium.org, msw@chromium.org

[msw, 2014-10-16 20:41:48]

lgtm, thanks!

[Daniel Erat, 2014-10-16 20:48:27]

The CQ bit was checked by derat@chromium.org

[commit-bot: I haz the power, 2014-10-16 20:50:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/639123005/20001

[commit-bot: I haz the power, 2014-10-16 21:48:38]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-10-16 21:49:49]

Patchset 2 (id:??) landed as
https://crrev.com/265af2d41669ac68001f192ac6f72a359f58a7dc
Cr-Commit-Position: refs/heads/master@{#299980}