Revert 232439 "Add a way for notifications to be linked from set..."

> Add a way for notifications to be linked from settings dialog.
> 
> Adds an event, onShowSettings, that is fired when the link is clicked.
> The link is only shown when the event is subscribed to.
> 
> BUG=304208,286608
> 
> Review URL: https://codereview.chromium.org/26876006

TBR=dewittj@chromium.org

Review URL: https://codereview.chromium.org/56353004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232444 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232444
Do not leak a GError from GetNoDisplayFromDesktopFile.

BUG=314127
TBR=erg@chromium.org

Review URL: https://codereview.chromium.org/54673010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232445 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232445