Bug 11748 switch to new DecoratorManager API
From the workbench change notes: API changes IWorkbenchPartSite.getDecoratorManager() - As the DecoratorManager has proven to be required for more than just IWorkbenchPartSites we have moved getDecoratorManager() to IWorkbench and deprecated the getDecoratorManager() in IWorkbenchPartSite. The one in IWorkbenchPartSite will be removed after the other Eclipse components have had a chance to switch to the new API.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/MethodsViewer.java
* @see Viewer#inputChanged(Object, Object)
	 */
	protected void inputChanged(Object input, Object oldInput) {
		super.inputChanged(input, oldInput);
	}
	
	/**
	 * Returns <code>true</code> if inherited methods are shown.
	 */	
	public boolean isShowInheritedMethods() {
		return ((MethodsContentProvider) getContentProvider()).isShowInheritedMethods();
	}
	/**
	 * Saves the state of the filter actions
	 */
	public void saveState(IMemento memento) {
		fMemberFilterActionGroup.saveState(memento);
		
		memento.putString(TAG_SHOWINHERITED, String.valueOf(isShowInheritedMethods()));
		ScrollBar bar= getTable().getVerticalBar();
		int position= bar != null ? bar.getSelection() : 0;
		memento.putString(TAG_VERTICAL_SCROLL, String.valueOf(position));
	}
	/**
	 * Restores the state of the filter actions
	 */	
	public void restoreState(IMemento memento) {
		fMemberFilterActionGroup.restoreState(memento);
		
		boolean set= Boolean.valueOf(memento.getString(TAG_SHOWINHERITED)).booleanValue();