tree e9c7803b0ce71269beb3d423549a2d6a0ac7784a
parent 3ff4deea307c38462393e4f83dabe32949338168
author tsepez <tsepez@chromium.org> 1478726906 -0800
committer Commit bot <commit-bot@chromium.org> 1478726906 -0800

Return unique_ptr from CPDF_Object::Clone().

Because that's what clone does.  There are numerous
release() calls that will go away as more code is
converted.

Review-Url: https://codereview.chromium.org/2484033002