Convert another clang warning that I missed in r287137.

BUG=none
NOTRY=true

Review URL: https://codereview.chromium.org/439113002

Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 977f377c23f388a14f638d68087aacfad9090bb1
1 file changed