**Reapply change that caused build break in chromeos/arm**

Add support for RLZ chrome extension api.

BUG=None
TEST=See unit tests as part of this CL.

Review URL: http://codereview.chromium.org/2864024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51326 0039d316-1c4b-4281-b951-d872f2087c98
11 files changed