Remove containsAttributeSelector() checks.

Remove containsAttributeSelector() checks.

We can just set the style as unique from inside the SelectorChecker
instead. That's not ideal either, but it's simpler, and we'll eventually
use a hashing function to instead make elements with attribute selectors
that have the same values share their style instead of disabling
sharing.

R=eseidel@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/0997b3f69d49c6259c04c3ffe6b3d658bd17dd81

[esprehn, 2014-12-15 21:29:40]

esprehn@chromium.org changed reviewers:
+ eseidel@chromium.org

[eseidel, 2014-12-15 21:30:23]

The CQ bit was checked by eseidel@chromium.org

[eseidel, 2014-12-15 21:30:24]

lgtm

[eseidel, 2014-12-15 21:30:38]

Do we need to test this to make sure we're not breaking it?

[commit-bot: I haz the power, 2014-12-15 21:32:18]

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

[commit-bot: I haz the power, 2014-12-15 21:32:19]

Commit queue rejected this change because it did not recognize the base URL.
Please commit your change manually.

[esprehn, 2014-12-15 21:43:44]

Committed patchset #1 (id:1) manually as
0997b3f69d49c6259c04c3ffe6b3d658bd17dd81 (presubmit successful).