Attempt to fix the asan/win build.

BUG=none
TBR=ager,glider
NOTRY=true

Review URL: https://codereview.chromium.org/556863005

git-svn-id: svn://svn.chromium.org/blink/trunk@181658 bbb929c8-8fbe-4397-9dbb-9b2b20218538