Update GrTextureStripAtlas for DDLs

Change-Id: I9d1344103b338f7e9dcd12739a9f192390f4cb94
Reviewed-on: https://skia-review.googlesource.com/144305
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
11 files changed