Bug 51665 [CoolBar] Extra flashiness when switching between perspectives
build I20040210-0800 In same window, - open a java perspective - open several java editors - open debug perspective - switch back and forth between java and debug perspectives The coolbar is noticeably flashier than it was in M6.
bundles/org.eclipse.jface/src/org/eclipse/jface/action/CoolBarManager.java
private MenuManager contextMenuManager = null;
    /**
     * The cool bar control; <code>null</code> before creation and after
     * disposal.
     */
    private CoolBar coolBar = null;
    /**
     * The cool bar items style; <code>SWT.NONE</code> by default.
     */
    private int itemStyle = SWT.NONE;
    /**
     * Creates a new cool bar manager with the default style. Equivalent to
     * <code>CoolBarManager(SWT.NONE)</code>.
     */
    public CoolBarManager() {
        
    }
    /**
     * Creates a cool bar manager for an existing cool bar control. This
     * manager becomes responsible for the control, and will dispose of it when
     * the manager is disposed.
     * 
     * @param coolBar
     *            the cool bar control
     */
    public CoolBarManager(CoolBar coolBar) {
        this();
        Assert.isNotNull(coolBar);
        this.coolBar = coolBar;
        itemStyle = coolBar.getStyle();