Associate clips with the right transform node.

The property tree builder would sometimes associate a clip with the
wrong transform node (for a given |layer|, the create-a-transform-node
step immediately precedes the creat-a-clip-node step, and we'd fail to
use the new transform node).

BUG=470267

Review URL: https://codereview.chromium.org/1047233002

Cr-Commit-Position: refs/heads/master@{#323089}
2 files changed