Unbreak build with clang.
Unbreak build with clang.

It's unclear whether it's a clang bug or our code is wrong, to be
verified later...

TBR=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/438323002

git-svn-id: f98b9d40cb02301bc76fa9e1b46ee668158567fd@22878 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh