Remove SkFontHost includes and friends.

Remove SkFontHost includes and friends.

SkFontHost no longer exists as a class, so remove the includes and stop
making it a friend.

Committed: https://skia.googlesource.com/skia/+/7be2eb89cc85fc9fc05814957d152f3d20613657

[bungeman-skia, 2015-02-23 16:13:10]

bungeman@google.com changed reviewers:
+ reed@google.com

[bungeman-skia, 2015-02-23 16:13:11]

I started this because SkTypeface is quite friendly, but it turns out that no
one should be friendly with SkFontHost anymore.

[bungeman-skia, 2015-02-23 16:13:14]

The CQ bit was checked by bungeman@google.com

[commit-bot: I haz the power, 2015-02-23 16:13:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/943333004/20001

[commit-bot: I haz the power, 2015-02-23 16:13:50]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2015-02-23 22:13 UTC

[commit-bot: I haz the power, 2015-02-23 16:13:55]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-02-23 16:13:56]

Presubmit check for 943333004-20001 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit ERRORS **
Since the CL is editing public API, you must have an LGTM from one of:
('reed@chromium.org', 'reed@google.com', 'bsalomon@chromium.org',
'bsalomon@google.com', 'djsollen@chromium.org', 'djsollen@google.com')

Presubmit checks took 1.1s to calculate.

[bungeman-skia, 2015-02-23 16:15:01]

The CQ bit was checked by bungeman@google.com

[commit-bot: I haz the power, 2015-02-23 16:15:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/943333004/20001

[reed1, 2015-02-23 16:19:20]

lgtm

[commit-bot: I haz the power, 2015-02-23 16:21:51]

This issue passed the CQ. To commit it, remove "COMMIT=false" from
the description and try again.

[bungeman-skia, 2015-02-23 16:23:42]

The CQ bit was checked by bungeman@google.com

[commit-bot: I haz the power, 2015-02-23 16:24:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/943333004/20001

[commit-bot: I haz the power, 2015-02-23 16:25:04]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/7be2eb89cc85fc9fc05814957d152f3d20613657