Bug 11748 switch to new DecoratorManager API
From the workbench change notes: API changes IWorkbenchPartSite.getDecoratorManager() - As the DecoratorManager has proven to be required for more than just IWorkbenchPartSites we have moved getDecoratorManager() to IWorkbench and deprecated the getDecoratorManager() in IWorkbenchPartSite. The one in IWorkbenchPartSite will be removed after the other Eclipse components have had a chance to switch to the new API.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/MethodsViewer.java
private static final String TAG_SHOWINHERITED= "showinherited";		 
	private static final String TAG_VERTICAL_SCROLL= "mv_vertical_scroll";		 
	
	private static final int LABEL_BASEFLAGS= StandardJavaUILabelProvider.DEFAULT_TEXTFLAGS;
	
	private MemberFilterActionGroup fMemberFilterActionGroup;
	
	private JavaUILabelProvider fLabelProvider;
		
	private OpenJavaElementAction fOpen;
	private ShowInheritedMembersAction fShowInheritedMembersAction;
	private ContextMenuGroup[] fStandardGroups;