hide getMetaData()

Bug: skia:
Change-Id: I2b513d4c5868bc0d4cdcdf0c95cc35e90c98f9a1
Reviewed-on: https://skia-review.googlesource.com/c/188824
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
2 files changed