Remove the initial spv2 property tree code

The initial approach to property trees in slimming paint v2 was to
compute them after paint. Our new design [1] now computes property
tree data before paint which makes the initial implementation
obsolete. This patch removes the original property tree code and
plumbing of a composited display list.

The lifecycle phase for compositing in spv2 has not been removed yet
due to test dependencies.

[1] https://docs.google.com/document/d/12I3JD1-Jmnb59ZHKyntFTSsNUzQhPae8QpCECtZt5zs

BUG=537409
TBR=chrishtr

Review URL: https://codereview.chromium.org/1402403004

Cr-Commit-Position: refs/heads/master@{#354830}
30 files changed