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/WebappAccessor.java
IPath path ) throws CoreException
	{
		
		String projectClassPaths = WorkspaceClasspathManager.getClassPath( );
		
		if ( projectClassPaths == null )
		{
			projectClassPaths = ""; 
		}
		System.setProperty( WORKSPACE_CLASSPATH_KEY, projectClassPaths );
		if ( !applicationsStarted )
		{
			IPath webappPath = getWebappPath( pluginId, path );
			
			
			IWebappServer server = AppServerWrapper.getInstance( )
					.getAppServer( );
			PluginClassLoaderWrapper loader = new PluginClassLoaderWrapper(pluginId);
			server.start( webappName, webappPath, loader );
			applicationsStarted = true;
		}
	}
	/**
	 * Stops the specified web application.
	 * 
	 * @param webappName
	 *            web application name
	 * @exception CoreException
	 */
	public static void stop( String webappName ) throws CoreException