Fix alphabetic order in code generator.

This change should land once wibling's change lands.

R=nbarth@chromium.org, wibling@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/189843007

git-svn-id: svn://svn.chromium.org/blink/trunk@168816 bbb929c8-8fbe-4397-9dbb-9b2b20218538