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
IExtensionTracker.REF_STRONG);
				continue;
			}
			if (element.getName().equals(MARKER_CONTENT_GENERATOR)) {
				processContentGenerator(tracker, extension, element);
				continue;
			}
			if (element.getName().equals(MARKER_FIELD)) {
				processMarkerField(tracker, extension, element);
				continue;
			}
		}
	}
	/**
	 * Create a table of MarkerFields
	 * 
	 * @param tracker
	 * @param extension
	 * @param element
	 */
	private void processMarkerField(IExtensionTracker tracker,
			IExtension extension, IConfigurationElement element) {
		MarkerField field = null;
		try {
			field = (MarkerField) IDEWorkbenchPlugin.createExtension(element,
					ATTRIBUTE_CLASS);
			field.setConfigurationElement(element);
		} catch (CoreException e) {
			MarkerSupportInternalUtilities.handle(e);
		}