Move SK_API from the class to the methods

Change-Id: Ifd49e6cc8c9900b98125e59cf2e69aa4e28c25e8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/235864
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
1 file changed