Created to fix http://code.google.com/p/skia/issues/detail?id=817 : UpdateDoxygen step does not fail when Doxygen step fails. Review URL: https://codereview.appspot.com/6480060
Created to fix http://code.google.com/p/skia/issues/detail?id=817 : UpdateDoxygen step does not fail when Doxygen step fails.
Review URL: https://codereview.appspot.com/6480060

git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@5278 2bbb7eff-a529-9590-31e7-b0007b416f81

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