tree 4b4e6e07b4f4371a443d057591665a5ac0bcbdd3
parent cdeeb095a629b0db9f0ddff09516f2b78255c047
author mtklein <mtklein@chromium.org> 1416503911 -0800
committer Commit bot <commit-bot@chromium.org> 1416503912 -0800

Add SkNVRefCnt, prune down SkPicture's size

SkNVRefCnt is a variant of SkRefCnt that's Not Virtual, so weighs 4 bytes
instead of 8 or 16.  There's only benefit to doing this if the deriving class
does not otherwise need a vtable, e.g. SkPicture.

I've stripped out some cruft from SkPicture, rearranged fields to pack tightly,
and added compile asserts for the sizes of SkPicture, SkRecord, and
SkVarAlloc.

BUG=skia:3144

Review URL: https://codereview.chromium.org/741793002