CSP 1.1: Revert CSSOM changes.

CSP 1.1: Revert CSSOM changes.

In r166627 and r166494, we changed CSP 1.1 to block certain CSSOM
operations if 'unsafe-eval' isn't present in a 'style-src' directive.
This seems to be incompatible with the web; it broke every site using
jQuery, GitHub, etc.

It's not clear that we can (or want to) persue this change; reverting
it for now while we chat about it again in the WG.

BUG=336413, 343970
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=167321

[Mike West, 2014-02-17 09:48:53]

Mind stamping this revert? It wasn't a clean revert, so I'm waiting to see what
the bots say rather than TBR/dcommiting it.

-mike

[jochen (gone - plz use gerrit), 2014-02-17 09:50:15]

lgtm

[Mike West, 2014-02-17 14:05:35]

The CQ bit was checked by mkwst@chromium.org

[commit-bot: I haz the power, 2014-02-17 14:05:58]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mkwst@chromium.org/169303003/90001

[commit-bot: I haz the power, 2014-02-17 17:27:45]

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

[commit-bot: I haz the power, 2014-02-17 17:27:46]

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

[Mike West, 2014-02-18 07:56:23]

The CQ bit was checked by mkwst@chromium.org

[commit-bot: I haz the power, 2014-02-18 07:56:36]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mkwst@chromium.org/169303003/90001

[commit-bot: I haz the power, 2014-02-18 09:42:51]

Change committed as 167321