Rewrite simple uses of base::ListValue::Append(base::Value*) on CrOS.

Generated with https://codereview.chromium.org/2056153003/.

BUG=581865
R=sky@chromium.org,xiyuan@chromium.org
TBR=stevenjb@chromium.org

Review-Url: https://codereview.chromium.org/2392693002
Cr-Commit-Position: refs/heads/master@{#422726}
70 files changed