Disable/enable echo for enterprise device.

Create a new policy to controll disable/enable Echo and make the policy value
avaialbe to Echo extension.

BUG=chromium-os:38500
TEST=unittest and manually check the flow is working.


Review URL: https://chromiumcodereview.appspot.com/12147004

git-svn-id: http://src.chromium.org/svn/trunk/src/chrome/browser/policy/proto@181649 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
1 file changed