Bug 29163 SafeRunnable needs to be accessible in JFace
We need to be able to access the SafeRunnable in JFace in order that some error protection can be added to preferences and properties dialogs.
bundles/org.eclipse.ui.workbench/extensions/org/eclipse/jface/dialogs/ErrorDialog.java
return JFaceResources.getImageRegistry().get(DLG_IMG_INFO);
		}
		
		return JFaceResources.getImageRegistry().get(DLG_IMG_ERROR);
	}
	/**
	 * Create this dialog's drop-down list component.
	 *
	 * @param parent the parent composite
	 * @return the drop-down list component
	 */
	protected List createDropDownList(Composite parent) {
		
		list =
			new List(
				parent,
				SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.MULTI);
		
		populateList(list);
		GridData data =
			new GridData(
				GridData.HORIZONTAL_ALIGN_FILL
					| GridData.GRAB_HORIZONTAL
					| GridData.VERTICAL_ALIGN_FILL
					| GridData.GRAB_VERTICAL);
		data.heightHint = list.getItemHeight() * LIST_ITEM_COUNT;
		data.horizontalSpan = 2;
		list.setLayoutData(data);
		list.setFont(parent.getFont());
		listCreated = true;