Bug 146352 support cancel execution for "view report ..." tool bar and menu actions.
Current "view report as HTML" and "view report as PDF" in the menu tool bar uses RunAndRender task to stream back the report output. As a result, total page count is not available when the report is being streamed back. Please change these two requests to use Run task and then render task to generate HTML or PDF, so that the total page count is calculate. preview tab could continue to use RunAndRender task, since it is for preview.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/soapengine/processor/BirtDocumentProcessor.java
* @param response
	 */
	public void handleChangeParameter( IContext context, Operation op, GetUpdatedObjectsResponse response )
		throws RemoteException
	{
		executeAction( new BirtChangeParameterActionHandler( context, op, response ), context, op, response );
	}
	/**
	 * Handle cache parameter.
	 * 
	 * @param dsSession
	 * @param op
	 * @param response
	 */
	public void handleCacheParameter( IContext context, Operation op, GetUpdatedObjectsResponse response )
		throws RemoteException
	{
		executeAction( new BirtCacheParameterActionHandler( context, op, response ), context, op, response );
	}
	/**
	 * Handle getting cascade parameter selection list.
	 * 
	 * @param context
	 * @param op
	 * @param response
	 * @throws RemoteException
	 */
	public void handleGetCascadingParameter( IContext context, Operation op, GetUpdatedObjectsResponse response )
		throws RemoteException
	{