Bug 277676 [UI] The workbench should create the contexts
The workbench should create contexts for the model elements, MApplication and MParts (windows, sashes, contributed parts, etc). This is not really the responsibility of the renderers. PW
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/internal/Workbench.java
* @param f
	 *            the IContributionFactory already provided to <code>r</code>
	 */
	public static void initializeRenderer(IExtensionRegistry registry,
			PartRenderer r, IEclipseContext context, IContributionFactory f) {
		
		
		
		IConfigurationElement[] factories = registry
				.getConfigurationElementsFor("org.eclipse.e4.workbench.partfactory"); 
		
		
		int offset = 0;
		for (int i = 0; i < factories.length; i++) {
			String clsSpec = factories[i].getAttribute("class"); 
			if (clsSpec.indexOf("Legacy") >= 0 
					|| clsSpec.indexOf("PartSash") >= 0) { 
				IConfigurationElement tmp = factories[offset];
				factories[offset++] = factories[i];
				factories[i] = tmp;
			}
		}
		for (int i = 0; i < factories.length; i++) {
			PartFactory factory = null;
			try {
				factory = (PartFactory) factories[i]
						.createExecutableExtension("class"); 
			} catch (CoreException e) {
				e.printStackTrace();
			}