cc: Remove recycled twin information from picture layer tiling set.

cc: Remove recycled twin information from picture layer tiling set.

This patch cleans up some more recycled twin information. In particular,
it removes it from the picture layer tiling set. This makes it possible
to remove one of the functions that gets the recycled twin from the
layer.

R=enne, danakj

Committed: https://crrev.com/7d351330df503f3b611e70c1de5394c527ebf514
Cr-Commit-Position: refs/heads/master@{#330820}

[vmpstr, 2015-05-20 20:37:28]

Please take a look.

[enne (OOO), 2015-05-20 20:45:38]

lgtm

[vmpstr, 2015-05-20 20:50:44]

The CQ bit was checked by vmpstr@chromium.org

[commit-bot: I haz the power, 2015-05-20 20:53:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1149843002/1

[commit-bot: I haz the power, 2015-05-20 22:37:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-20 22:38:20]

Patchset 1 (id:??) landed as
https://crrev.com/7d351330df503f3b611e70c1de5394c527ebf514
Cr-Commit-Position: refs/heads/master@{#330820}