Revert "Update to cef 3.1547.1337"

This reverts commit f871e6f749f86116d39538406522122ffb6cce4d.
Merge pull request #289 from adobe/jasonsanjose/revert-cef

Revert "Update to cef 3.1547.1337" for Sprint 28 build
Set sprint 29 version
Merge pull request #290 from adobe/nj/set-sprint-29

Set sprint 29 version