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/action/StatusLine.java
public Point computeSize(Composite composite, int wHint, int hHint, boolean changed) {
				
			if (wHint != SWT.DEFAULT && hHint != SWT.DEFAULT)
				return new Point(wHint, hHint);
	
			Control[] children= composite.getChildren();
			int totalWidth= 0;
			int maxHeight= 0;
			int totalCnt= 0;
			for (int i= 0; i < children.length; i++) {
				boolean useWidth= true;
				Control w= children[i];
				if (w == fProgressBar && !fProgressIsVisible)
					useWidth= false;
				else if (w == fToolBar && !fCancelButtonIsVisible)
					useWidth= false;
				Point e= w.computeSize(SWT.DEFAULT, SWT.DEFAULT, changed);
				if (useWidth) {
					totalWidth+= e.x;
					totalCnt++;
				}
				maxHeight= Math.max(maxHeight, e.y);
			}
			if (totalCnt > 0)
				totalWidth+= (totalCnt-1) * GAP;
			if (totalWidth <= 0)
				totalWidth= maxHeight*4;
			return new Point(totalWidth, maxHeight);