Bug 305800 [CommonNavigator] Small tracing improvement
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/NavigatorContentDescriptor.java
* but only {@link ILabelProvider} is required.
	 * 
	 * @return An instance of the Label provider defined for this extension
	 * @throws CoreException
	 *             if an instance of the executable extension could not be
	 *             created for any reason
	 */
	public ILabelProvider createLabelProvider() throws CoreException {
		return (ILabelProvider) configElement
				.createExecutableExtension(ATT_LABEL_PROVIDER);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.navigator.extensions.INavigatorContentDescriptor#isActiveByDefault()
	 */
	public boolean isActiveByDefault() {
		if (activeByDefault)
			return true;
		if (initialActivation == null)
			return false;
		try {
			IEvaluationContext context = NavigatorPlugin.getEvalContext(new Object());
			return (initialActivation.evaluate(context) == EvaluationResult.TRUE);
		} catch (CoreException e) {
			NavigatorPlugin.logError(0, e.getMessage(), e);
		}
		return false;
	}
	/**