Increase the cache size of fontconfig queries.

Increase the cache size of fontconfig queries.

As is described in http://crbug.com/440551#c28, the cache size
64 isn't big enough in ChromeOS, usually ChromeOS has fonts as much
as 100. Unsupported glyph can run out this cache with a single
character.

BUG=440551
R=derat@chromium.org, ckocagil@chromium.org
TBR=asvitkine@chromium.org
TEST=open data:text/html;charset=UTF8,<title>a%E2%9C%A8</title> and
  see the slowness around drawing has gone.

Committed: https://crrev.com/b18055e3d9b5b026c5c26b1650d38ef1eb4c97e6
Cr-Commit-Position: refs/heads/master@{#311568}

[Jun Mukai, 2015-01-14 21:57:34]

mukai@chromium.org changed reviewers:
+ ckocagil@chromium.org

[ckocagil, 2015-01-14 22:06:25]

lgtm

[Jun Mukai, 2015-01-14 22:12:01]

mukai@chromium.org changed reviewers:
+ asvitkine@chromium.org

[Jun Mukai, 2015-01-14 22:12:19]

Thanks. TBR-ing...

[Jun Mukai, 2015-01-14 22:12:22]

The CQ bit was checked by mukai@chromium.org

[Alexei Svitkine (slow), 2015-01-14 22:13:08]

lgtm

[commit-bot: I haz the power, 2015-01-14 22:13:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/796623005/1

[Daniel Erat, 2015-01-14 23:08:35]

lgtm

wow, this has grown a lot. it was just intended as a minor optimization
initially. :-P

[commit-bot: I haz the power, 2015-01-14 23:09:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-14 23:09:55]

Patchset 1 (id:??) landed as
https://crrev.com/b18055e3d9b5b026c5c26b1650d38ef1eb4c97e6
Cr-Commit-Position: refs/heads/master@{#311568}