gecko-dev/layout/reftests/css-variables/variables-ruletree-cache-01...

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<!DOCTYPE html>
<style>
p { --foo: purple; background-color: var(--foo) }
p#myid { --foo: blue }
</style>
<p>This should be purple, and might cache background in the rule tree.</p>
<p id="myid">This should be blue, and can't used that cached struct,
which really shouldn't be cached anyway.</p>