Bug 167450 [DataBinding] Get rid of bind support factory magic
I finally realized that we don't need that other magic factory. I'll move fillBindSpecDefaults() and the methods it calls (createConverter, createValidator etc) to a new class DefaultBindSpec. Clients who want default validators and converters created for them just create a DefaultBindSpec as opposed to a (rather empty) BindSpec. I will also move the early type checking into DefaultBindSpec to make it optional as well.
bundles/org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/ListBinding.java
private boolean updating = false;
	private IObservableList modelList;
	private final IObservableList targetList;
	/**
	 * @param context
	 * @param targetList
	 * @param target
	 * @param modelList
	 * @param model
	 * @param bindSpec
	 */
	public ListBinding(DataBindingContext context, IObservableList targetList,
			IObservableList modelList, BindSpec bindSpec) {
		super(context);
		this.targetList = targetList;
		this.modelList = modelList;
		partialValidationErrorObservable = new WritableValue(context
				.getValidationRealm(), null);
		validationErrorObservable = new WritableValue(context
				.getValidationRealm(), null);