Bug 291069 [Commands] IWorkbenchCommandConstants should also define command parameter ids
HEAD IWorkbenchCommandConstants should also define the parameter ids that are used by commands. E.g. the NAVIGATE_SHOW_IN command defines a <commandParameter> with id 'org.eclipse.ui.navigate.showIn.targetId' in the plugin.xml, but I didn't find a constant for that (only two internal constants: ShowInHandler.TARGET_ID, ShowInMenu.SHOW_IN_PARM_ID).
tests/org.eclipse.ui.tests.performance/src/org/eclipse/ui/tests/performance/OpenClosePerspectiveTest.java
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 * Copyright (c) 2004, 2007 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
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 * http://www.eclipse.org/legal/epl-v10.html
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 * Contributors:
 *     IBM Corporation - initial API and implementation
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package org.eclipse.ui.tests.performance;
import java.util.HashMap;
import org.eclipse.core.commands.Command;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.NotEnabledException;
import org.eclipse.core.commands.NotHandledException;
import org.eclipse.core.commands.ParameterizedCommand;
import org.eclipse.core.commands.common.NotDefinedException;
import org.eclipse.test.performance.Dimension;
import org.eclipse.ui.IPerspectiveDescriptor;
import org.eclipse.ui.IPerspectiveRegistry;
import org.eclipse.ui.IViewReference;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.commands.ICommandService;
import org.eclipse.ui.handlers.IHandlerService;
import org.eclipse.ui.internal.WorkbenchPlugin;