This changeset will skip finding the first SMIL animation function to affect the sandwich from multiple functions if element hasn't primary frame when composing attributes.
This mean that target element's animation don't need to animate in the following cases.
- ancestor elements has display:none attribute.
- target element have display:none attribute.
- ancestor element's tag produces a non-rendering subtree, by definition (like <desc>).
MozReview-Commit-ID: 253qTpBLc8L
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extra : rebase_source : c6f0eff440fa5448fc28e5283be68b6e33335b9e