Bug 244047 [Browser] Extension point schema previews open in internal browser
I20080812-0800, was OK in 3.4 Extension point schema previews open in an internal browser, even though I've set Preferences > General > Web Browsing > Use external Web browser.
bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/DefaultBrowserSupport.java
/*******************************************************************************
 * Copyright (c) 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - Initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.internal.browser;
import java.util.HashMap;
import java.util.Observable;
import java.util.Observer;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.browser.AbstractWorkbenchBrowserSupport;
import org.eclipse.ui.browser.IWebBrowser;
import org.eclipse.ui.browser.IWorkbenchBrowserSupport;
/**
 * Implementation of the workbench browser support.
 */
public class DefaultBrowserSupport extends AbstractWorkbenchBrowserSupport {
	static final String SHARED_ID = "org.eclipse.ui.browser"; 
	static final String DEFAULT_ID_BASE = "org.eclipse.ui.defaultBrowser"; 
	protected HashMap browserIdMap = new HashMap();
	protected static DefaultBrowserSupport instance;
	public DefaultBrowserSupport() {