That was a proposed usecase to see if the new menu contributions in 3.3
could support the problems view. There is no supporting code.
However if you look at org.eclipse.ui.ide/plugin.xml there should be a
lot of examples in HEAD of adding commands/handlers/menu contributions
to the new problems view.
Also check out the help link listed below, it discusses commands,
handlers, and then placing references to the commands in menus and
toolbars (menu contributions)
PW
--
Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions
http://wiki.eclipse.org/Menus_Extension_Mapping
http://help.eclipse.org/help33/index.jsp?topic=/org.eclipse.platform.doc.isv/guide/workbench.htm