Bug 126573 [Dialogs] StatusDialog should extend TrayDialog
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/StatusDialog.java
this(parent, SWT.LEFT);
		}
		/**
		 * Creates a new message line as a child of the parent and with the
		 * given SWT stylebits.
		 * @param parent
		 * @param style
		 */
		public MessageLine(Composite parent, int style) {
			super(parent, style);
			fNormalMsgAreaBackground = getBackground();
		}
		/**
		 * Find an image assocated with the status.
		 * @param status
		 * @return Image
		 */
		private Image findImage(IStatus status) {
			if (status.isOK()) {
				return null;
			} else if (status.matches(IStatus.ERROR)) {
				return JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_ERROR);
			} else if (status.matches(IStatus.WARNING)) {
				return JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_WARNING);
			} else if (status.matches(IStatus.INFO)) {
				return JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_INFO);
			}
			return null;
		}
		/**