Bug 36486 call hierarchy: should use adapters
call hierarchy should use adapters to allow actions contributed on object to be added to the context menu
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyViewPart.java
fNoHierarchyShownLabel = new Label(fPagebook, SWT.TOP + SWT.LEFT + SWT.WRAP);
        fNoHierarchyShownLabel.setText(CallHierarchyMessages.getString(
                "CallHierarchyViewPart.empty"));    
        showPage(PAGE_EMPTY);
        WorkbenchHelp.setHelp(fPagebook, IJavaHelpContextIds.CALL_HIERARCHY_VIEW);
        
        fSelectionProviderMediator = new SelectionProviderMediator(new Viewer[] {
                    fCallHierarchyViewer, fLocationViewer
                });
        IStatusLineManager slManager = getViewSite().getActionBars().getStatusLineManager();
        fSelectionProviderMediator.addSelectionChangedListener(new StatusBarUpdater(
                slManager));
        getSite().setSelectionProvider(fSelectionProviderMediator);
        makeActions();
        fillViewMenu();
        fillActionBars();
        initOrientation();
        initCallMode();
        initJavaLabelFormat();
        if (fMemento != null) {
            restoreState(fMemento);
        }
    }
    /**
     * @param PAGE_EMPTY
     */
    private void showPage(int page) {
        if (page == PAGE_EMPTY) {
            fPagebook.showPage(fNoHierarchyShownLabel);