Remove use of SkSmallAllocator from all Loopers.

R=reed@google.com

Change-Id: I22b140ee8e12900de13bc623adb30b5fca3051f9
Reviewed-on: https://skia-review.googlesource.com/7658
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Herb Derby <herb@google.com>
9 files changed