Bug 117601 [Undo] - update org.eclipse.core.commands.operations to use new equinox common utils
org.eclipse.core.commands.operations.DefaultOperationHistory - synchronizes its own listener list org.eclipse.core.commands.internal.util. - implements its own Assert. These should be updated to use the new support in org.eclipse.equinox.common
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/AbstractOperation.java
public abstract IStatus execute(IProgressMonitor monitor, IAdaptable info)
			throws ExecutionException;
	public final IUndoContext[] getContexts() {
		return (IUndoContext[]) contexts.toArray(new IUndoContext[contexts
				.size()]);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.commands.operations.IUndoableOperation#getLabel()
	 *      <p> Default implementation. Subclasses may override this method.
	 *      </p>
	 */
	public String getLabel() {
		return label;
	}
	/**
	 * Set the label of the operation to the specified name.
	 * 
	 * @param name
	 *            the string to be used for the label.
	 */
	public void setLabel(String name) {
		label = name;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.commands.operations.IUndoableOperation#hasContext(org.eclipse.core.commands.operations.IUndoContext)
	 */