tree 741d0ab97bd554965db907a269b2727a32bd3959
parent 1a4900e8be6086a824488dc98d4822e440815657
author mtklein <mtklein@chromium.org> 1418330584 -0800
committer Commit bot <commit-bot@chromium.org> 1418330584 -0800

Enforce thread-safety of bitmaps in pictures via the type.

No runtime difference here, but it makes it impossible to forget to make
a shallow copy; you can't get at the full bitmap without it.

NOTREECHECKS=true

BUG=skia:

Review URL: https://codereview.chromium.org/799603002