Test for css3-animations running on the compositor thread (Bug michael@0: 964646)

michael@0: michael@0: michael@0: michael@0: michael@0: michael@0: michael@0: Test for css3-animations running on the compositor thread (Bug michael@0: 964646) michael@0: michael@0: michael@0: michael@0: michael@0: michael@0: michael@0: michael@0: Mozilla Bug michael@0: 964646 michael@0:

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