Bug 976247 - Remove a useless static keyword from mozilla::detail::DEAD; r=froydnj

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extra : rebase_source : e73444ec000f1e867651d39cf2aa6beaf88bf4f3
Bug 976372 - Remove support for compilers which lack support for dynamic_cast<void*>; r=dbaron

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extra : rebase_source : 83a23e3b8fa4462eb70a1844b555c7605162a497