Public pods are now extended properly. Conflict of event handlers resolved.

BUG=334625

Review URL: https://codereview.chromium.org/132693028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246662 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246662