Bug 156969 [regression]Group header repeat doesn't work in Web Viewer.
Description: Group header repeat doesn't work in Web Viewer. Steps to reproduce: 1. New a data source and dataset, drag the dataset to Layout. 2. Add a group. 3. Set page break in the first data item in table detail row. 4. Preview in web viewer&#12290; Expected result: Group header is repeated in each page. Actual result: No group header repeat effect.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/ir/EngineIRReader.java
int count = masterPage.getHeaderCount( );
				for ( int j = 0; j < count; j++ )
				{
					ReportItemDesign item = masterPage.getHeader( i );
					item.accept( this, null );
				}
				count = masterPage.getFooterCount( );
				for ( int j = 0; j < count; j++ )
				{
					ReportItemDesign item = masterPage.getFooter( i );
					item.accept( this, null );
				}
			}
			
			int count = report.getContentCount( );
			for ( int i = 0; i < count; i++ )
			{
				ReportItemDesign item = report.getContent( i );
				item.accept( this, null );
			}
		}
		protected void linkReportElement( ReportElementDesign element )
		{
			long id = element.getID( );
			DesignElementHandle elementHandle = handle.getElementByID( id );
			element.setHandle( elementHandle );
			report.setReportItemInstanceID( id, element );
		}
		public Object visitBand( BandDesign band, Object value )
		{