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/views/markers/internal/MarkerSupportRegistry.java
description = description.substring(1, description.length());
				contains = false;
			}
			filter.setContains(contains);
			filter.setDescription(description);
		}
		int severityValue = getSeverityValue(element);
		if (severityValue > 0) {
			filter.setSelectBySeverity(true);
			filter.setSeverity(severityValue);
		} else {
			filter.setSelectBySeverity(false);
		}
		List selectedTypes = new ArrayList();
		IConfigurationElement[] types = element.getChildren(SELECTED_TYPE);
		for (int j = 0; j < types.length; j++) {
			String markerId = types[j].getAttribute(MARKER_ID);
			if (markerId != null) {
				MarkerType type = filter.getMarkerType(markerId);
				if (type == null) {
					IStatus status = new Status(
							IStatus.WARNING,
							IDEWorkbenchPlugin.IDE_WORKBENCH,
							IStatus.WARNING,
							NLS
									.bind(
											MarkerMessages.ProblemFilterRegistry_nullType,
											new Object[] { markerId,
													filter.getName() }), null);
					IDEWorkbenchPlugin.getDefault().getLog().log(status);