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/databinding/DefaultBindSupportFactory.java
public Boolean isAssignableFromTo(Object fromType, Object toType) {
		if (fromType instanceof Class && toType instanceof Class) {
			Class toClass = (Class) toType;
			if (toClass.isPrimitive()) {
				toClass = autoboxed(toClass);
			}
			Class fromClass = (Class) fromType;
			if (fromClass.isPrimitive()) {
				fromClass = autoboxed(fromClass);
			}
			return toClass.isAssignableFrom(fromClass) ? Boolean.TRUE