Bug 214492 [Markers] Need to be able to add filters to existing markers views
Currently you can only add filters to a new markerContentProvider. We need to able to bind them to existing markerContentProviders as well.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerContentGenerator.java
IResource parent = resource.getParent();
				boolean found = false;
				while (parent != null) {
					if (resourcesToSearch.contains(parent)) {
						found = true;
					}
					parent = parent.getParent();
				}
				
				
				
				if (found) {
					continue;
				}
			}
			
			while (iter.hasNext()) {
				MarkerType markerType = (MarkerType) iter.next();
				try {
					
					
					
					IMarker[] markers = resource.findMarkers(
							markerType.getId(), includeAllSubtypes
									.contains(markerType), depth);
					monitor.worked(1);
					filterMarkers(results, group, markers);
				} catch (CoreException e) {
					MarkerSupportInternalUtilities.handle(e);
				}