Move Alternate Family Logic into separate header

Move Alternate Family Logic into separate header

Move the alternate font family name logic out of FontCache and into a
new dedicated AlternateFontFamily.h file. This moves the non-cache
related functionality out of the FontCache simplifying the interface.

BUG=309714
R=eseidel@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=160163

[eseidel, 2013-10-21 18:16:39]

lgtm

[commit-bot: I haz the power, 2013-10-21 18:17:48]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eae@chromium.org/31923005/1

[commit-bot: I haz the power, 2013-10-21 18:51:42]

Sorry for I got bad news for ya.
Compile failed with a clobber build on mac_layout.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_layout...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-10-21 19:56:57]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eae@chromium.org/31923005/170001

[commit-bot: I haz the power, 2013-10-22 09:11:00]

Change committed as 160163