Bug 166001 The webpage can't be found in WebView, if "WebViewer.startup( null );" is not called.
Now I'm using a SVG viewer to preview report in designer, it need not a HTTP server. So I removed "WebViewer.startup( null );" from designer's initial process, but I found those "web view as ..." all can not open a web page.
viewer/org.eclipse.birt.report.viewer/src/org/eclipse/birt/report/viewer/utilities/WebViewer.java
{
			root = createURL( "run", report, format, true, null, null ); 
		}
		else
		{
			root = createURL(
					allowPage ? "frameset" : "run", report, format, true, null, null ) + "&" + new Random( ).nextInt( ); 
		}
		try
		{
			BrowserAccessor.getPreviewBrowser( false ).displayURL( root );
		}
		catch ( Exception e )
		{
			
		}
	}
	/**
	 * Displays the specified url useing eclipse SWT browser.
	 * 
	 * @param report
	 *            report report
	 * @param format
	 *            report format
	 * @param browser
	 *            SWT browser instance
	 * @deprecated
	 */
	public static void display( String report, String format, Browser browser )
	{