Bug 208373 Auto resize Chart to have a single axis without blank
When Chart is within Cross tab, chart axis image should have a single axis only, but there may be much blank in other area. Chart engine should auto resize the image to have the axis with fit size. Meanwhile, report engine should not set size for chart image.
chart/org.eclipse.birt.chart.reportitem/src/org/eclipse/birt/chart/reportitem/ChartReportItemUtil.java
*            the handle of the element which needs binding columns
	 * @return the holder for the element,or itself if no holder available
	 */
	public static ReportItemHandle getBindingHolder( DesignElementHandle handle )
	{
		if ( handle instanceof ReportElementHandle )
		{
			if ( handle instanceof ListingHandle )
			{
				return (ReportItemHandle) handle;
			}
			if ( handle instanceof ReportItemHandle )
			{
				if ( ( (ReportItemHandle) handle ).getDataBindingReference( ) != null
						|| ( (ReportItemHandle) handle ).getCube( ) != null
						|| ( (ReportItemHandle) handle ).getDataSet( ) != null
						|| ( (ReportItemHandle) handle ).columnBindingsIterator( )
								.hasNext( ) )
				{
					return (ReportItemHandle) handle;
				}
			}
			ReportItemHandle result = getBindingHolder( handle.getContainer( ) );
			if ( result == null
					&& handle instanceof ReportItemHandle
					&& !( handle instanceof GridHandle ) )
			{
				result = (ReportItemHandle) handle;
			}
			return result;