Bug 205049 Other plug-ins should be able to define default content generator
Currently only the content generator can define which plug-ins it can be the default for - we need a way for plug-ins to refer back to the marker support for thier own generator.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerContentGenerator.java
IResource[] result = traversal.getResources();
				for (int j = 0; j < result.length; j++) {
					resourceCollection.add(result[j]);
				}
			}
		} catch (CoreException e) {
			StatusManager.getManager().handle(e.getStatus());
		}
	}
	/**
	 * Compute all of the markers for the receiver's type.
	 * 
	 * @param subMonitor
	 * @return MarkerEntry
	 */
	private Collection computeAllMarkers(SubProgressMonitor subMonitor) {
		Collection allMarkers = new HashSet();
		findMarkers(allMarkers, new IResource[] { ResourcesPlugin
				.getWorkspace().getRoot() }, null, IResource.DEPTH_INFINITE,
				subMonitor);
		return allMarkers;
	}
	/**
	 * Compute the marker for the supplied filter and add to return markers.
	 * 
	 * @param returnMarkers
	 *            {@link Collection} of {@link IMarker}
	 * @param subMonitor
	 * @param filterGroup
	 */