Bug 166052 [Viewers] Regression: decorator of DecoratingLabelProvider completely replaces label provider
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/DecoratingLabelProvider.java
public Color getForeground(Object element) {
		if (provider instanceof IColorProvider) {
			return ((IColorProvider) provider).getForeground(element);
		}
		return null;
	}
	/**
	 * Return the decoration context associated with this label provider. It
	 * will be passed to the decorator if the decorator is an instance of
	 * {@link LabelDecorator}.
	 * 
	 * @return the decoration context associated with this label provider
	 * 
	 * @since 3.2
	 */
	public IDecorationContext getDecorationContext() {
		return decorationContext;
	}
	/**
	 * Set the decoration context that will be based to the decorator for this
	 * label provider if that decorator implements {@link LabelDecorator}.
	 * 
	 * @param decorationContext
	 *            the decoration context.
	 * 
	 * @since 3.2
	 */
	public void setDecorationContext(IDecorationContext decorationContext) {
		org.eclipse.core.runtime.Assert.isNotNull(decorationContext);
		this.decorationContext = decorationContext;