fixed ASAN dm errors

Bug: skia:
Change-Id: Iade74ee6a4f063deb5af66d3b06affba28977011
Reviewed-on: https://skia-review.googlesource.com/141966
Reviewed-by: Ruiqi Mao <ruiqimao@google.com>
Commit-Queue: Ruiqi Mao <ruiqimao@google.com>
1 file changed