Remove traceStartup from Domado. https://codereview.appspot.com/6915044
Remove traceStartup from Domado.
https://codereview.appspot.com/6915044

traceStartup was left over from the original port of Domado, and has not
been used since, so I am removing it, to reduce minified code size and
the runtime cost of the no-op calls. I have replaced some of those which
were useful as signposts in the code with comments.

Also fixed a missing semicolon and added a note about named constructors.

R=metaweta@gmail.com


git-svn-id: eb21526166532bd3afc2c1499c0cf105ce815f5a@5186 360991c0-9f3b-0410-ba87-8b362a00edf4

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