Rules inside imports should use the fast selector checker codepath.
Rules inside imports should use the fast selector checker codepath.

That they don't is just a bug that crept in at some point.

Review URL: https://codereview.chromium.org/110733002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@163485 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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