Introduce GenericFontFamilySettings.

Introduce GenericFontFamilySettings.

The newborn will hold all settings, related to generic font
families, and will be used by Settings.

Aside from mechanical extraction, there is one functional change:
setting font families will require explicit call to recalc style
on all frames. Thankfully, this is already done in most places,
aside from InternalSettings, where I added it.

R=eae,ksakamoto@chromium.org
BUG=324991
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=163117

[eseidel, 2013-12-03 00:33:27]

lgtm.  copy pasta!

dglazkov and I discussed that in the long-term we plan to remove Page* from
Settings, and either make all callers responsible for doing their own
invalidation of all possible consumers of settings, or provide a generic
notification mechanism on Settings which consumers can sign up for to invalidate
themselves when settings changes.

Eventually the embedder will provide each Frame with a Settings and at least in
the latter model each Frame will be responsible for noticing when those Settings
change and invalidating appropriately.

[Kunihiko Sakamoto, 2013-12-03 01:33:46]

lgtm

[commit-bot: I haz the power, 2013-12-03 04:34:11]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dglazkov@chromium.org/100653002/1

[commit-bot: I haz the power, 2013-12-03 05:29:00]

Retried try job too often on mac_layout for step(s) webkit_lint
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_layout...

[dglazkov, 2013-12-03 18:17:57]

Trying to figure out what these try fails are about...

[commit-bot: I haz the power, 2013-12-03 20:52:12]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dglazkov@chromium.org/100653002/20001

[commit-bot: I haz the power, 2013-12-03 21:01:25]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dglazkov@chromium.org/100653002/20001

[commit-bot: I haz the power, 2013-12-03 22:51:08]

Change committed as 163117