Bug 61313 Platform native icons not used in dialogs
N20040506 For example the 'info' icon for operations in progress, the 'error' icon when an exception occurs, and the 'question' icon when asked to confirm a resource deletion. These used to use the native icons on Windows XP but now they look quite different and non-native. This is a fairly recent regression.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
* has been called.
	 * </p>
	 * <p>
	 * Clients may call this framework method, but should not override it.
	 * </p>
	 * 
	 * @param dlus
	 *            the number of horizontal dialog units
	 * @return the number of pixels
	 */
	protected int convertHorizontalDLUsToPixels(int dlus) {
		
		if (fontMetrics == null)
			return 0;
		return convertHorizontalDLUsToPixels(fontMetrics, dlus);
	}
	/**
	 * Returns the number of pixels corresponding to the given number of
	 * vertical dialog units.
	 * <p>
	 * This method may only be called after <code>initializeDialogUnits</code>
	 * has been called.
	 * </p>
	 * <p>
	 * Clients may call this framework method, but should not override it.
	 * </p>
	 * 
	 * @param dlus
	 *            the number of vertical dialog units
	 * @return the number of pixels