Move memory usage calculation to SkStrikeCache::Strike

Change-Id: I96f5581b6a8dcc2c245590ae180a304e4b2ecbdf
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/271657
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
1 file changed