cc: Don't refer to layer render target when using property trees

cc: Don't refer to layer render target when using property trees

This is a vestige of old UpdateDrawProperties and instead should go
directly to the target_id on the transform node.  Also, the root node
was setting the target_id incorrectly because its transform_node_index
was not set before being referenced.

This is a fix contributing towards getting property trees to entirely
replace UpdateDrawProperties on the main thread.

Committed: https://crrev.com/e7fba1549e8bd030735e8f5b2269f69787c94f08
Cr-Commit-Position: refs/heads/master@{#314918}

[enne (OOO), 2015-02-05 22:48:35]

enne@chromium.org changed reviewers:
+ ajuma@chromium.org, vollick@chromium.org

[Ian Vollick, 2015-02-05 22:51:47]

On 2015/02/05 22:48:38, enne wrote:

cool. lgtm.

[enne (OOO), 2015-02-05 22:59:53]

The CQ bit was checked by enne@chromium.org

[commit-bot: I haz the power, 2015-02-05 23:01:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/897373002/1

[commit-bot: I haz the power, 2015-02-05 23:58:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-06 00:00:20]

Patchset 1 (id:??) landed as
https://crrev.com/e7fba1549e8bd030735e8f5b2269f69787c94f08
Cr-Commit-Position: refs/heads/master@{#314918}