tree 42930bca08650730ef2aba728799c9428edab79e
parent 5e4388ef805b1666a1064e4dc73f4f1e792aa041
author tsepez <tsepez@chromium.org> 1481753714 -0800
committer Commit bot <commit-bot@chromium.org> 1481753714 -0800

Return unique_ptr from GetAlphaMask.

Rename GetAlphaMask => CloneAlphaMask since it does more than get.
Rename CopyAlphaMask => SetAlphaMask, as it copies IN, not OUT.
ditto for CopyPalette => SetPalette.

BUG=

Review-Url: https://codereview.chromium.org/2572243002