Bug 1065507, part 1 - Remove dead function xpc_qsGetterOnlyPropertyStub.

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extra : rebase_source : 6dbeb6dd2e69511682b5b3e8582104d06d13766d
Bug 1065507, part 2 - Change XPCWrappedNatives to use a null setter instead of js_GetterOnlyPropertyStub.

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extra : rebase_source : dccc09d810a07019c582d1fbda431e57287b690a
Bug 1065507, part 3 - Remove special support for js_GetterOnlyPropertyStub from js/ipc.

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extra : rebase_source : cc10de476c7c40324f9ae781c6e06500a53edb1b
Bug 1065507, part 4 - Remove js_GetterOnlyPropertyStub.

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extra : rebase_source : daa17eaccddce4bcb510d2bd83799396d564728a