Bug 1072701 - Build some Firefox OS specific DOM code in unified mode; r=baku

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extra : rebase_source : 4a8812c18341c9851fb3265e1f8e6c77a95911c5
Bug 1072299 - Build dom/animation in unified mode; r=baku

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extra : rebase_source : 2119739c119fddb1204f6941b19a9a3f68d49cf8
Bug 1072310 - Build more DOM code in unified mode; r=baku

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extra : rebase_source : a34dbc7323238d5f83a0144b62a6c52c3e6c54dc