Rename GrAtlasTextBatch->GrAtlasTextOp and sk_sp

Change-Id: I409048988cccb68daaeb66828e2772fcb6a0cb06
Reviewed-on: https://skia-review.googlesource.com/6104
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
6 files changed