Clean up the policy templates file.

The ChromeOS platform support versions were written both as 0.NN and NN;
changed to always use NN as for the other platforms.

The script that parses this file is currently ignoring the concrete version
number and only looks for a '-', and doesn't need to be updated.

BUG=None

Review URL: https://codereview.chromium.org/26333006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228682 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228682
Remove cr.Event in favor of Event

DOM has improved a lot since we first started. We can now use the native
Event constructor.

Revert 228270, which was a revert of 228259

BUG=None
TBR=abodenha@chromium.org

Review URL: https://codereview.chromium.org/26823007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228683 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228683