Miscellaneous dynamic atlas fixes.

Make Chinese fling sample closer to Android test.
Fix a bug in GrDrawOpAtlas::compact(), where the atlas
generation wasn't incremented so the client didn't know it changed.
Add some debug info for GrDrawOpAtlas.
Add a comment in GrDrawOpAtlas::setLastUseTokenBulk.

Change-Id: I79192a017870541a79731b1a22f665ec5deeff09
Reviewed-on: https://skia-review.googlesource.com/52761
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
3 files changed