Remove SkRefCnt_SafeAssign.

Change-Id: I590e74c2de8e0c2b8d407bd869c97a4d3bd98fed
Reviewed-on: https://skia-review.googlesource.com/141041
Commit-Queue: Herb Derby <herb@google.com>
Auto-Submit: Ben Wagner <bungeman@google.com>
Reviewed-by: Herb Derby <herb@google.com>
1 file changed