Bug 189490 [CommonNavigator] Go To->Resource won't enable
I0524 1. Open the Project Explorer in the Resource perspective 2. Create a vanilla project P 3. Create a folder F 4. Create a file resource R Open the Navigate->Go To file. "Resource..." will remain disabled.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorContentService.java
.hasNext();) {
			try {
				listener = (INavigatorContentServiceListener) listenersItr
						.next();
				listener.onLoad(aDescriptorInstance);
			} catch (RuntimeException re) {
				if (failedListeners == null) {
					failedListeners = new ArrayList();
				}
				failedListeners.add(listener);
			}
		}
		if (failedListeners != null) {
			listeners.removeAll(failedListeners);
		}
	}
	private ITreeContentProvider[] extractContentProviders(
			Set theDescriptorInstances) {
		if (theDescriptorInstances.size() == 0) {
			return NO_CONTENT_PROVIDERS;
		}
		List resultProvidersList = new ArrayList();
		for (Iterator itr = theDescriptorInstances.iterator(); itr.hasNext();) {
			resultProvidersList.add(((NavigatorContentExtension) itr.next())
					.internalGetContentProvider());
		}
		return (ITreeContentProvider[]) resultProvidersList
				.toArray(new ITreeContentProvider[resultProvidersList.size()]);
	}
	private Set extractDescriptorInstances(Set theDescriptors,