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/DefaultOperationHistory.java
status = getUndoApproval(operation, info);
			if (status.isOK()) {
				status = doUndo(monitor, info, operation);
			}
		} else {
			if (DEBUG_OPERATION_HISTORY_UNEXPECTED) {
				System.out
						.print("OPERATIONHISTORY >>> Undo operation not valid - ");  
				System.out.print(operation);
				System.out.println();
			}
			status = IOperationHistory.OPERATION_INVALID_STATUS;
		}
		return status;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.commands.operations.IOperationHistory#openOperation(org.eclipse.core.commands.operations.ICompositeOperation)
	 */
	public void openOperation(ICompositeOperation operation, int mode) {
		synchronized (openCompositeLock) {
			if (openComposite != null && openComposite != operation) {
				
				if (DEBUG_OPERATION_HISTORY_UNEXPECTED) {
					System.out
							.print("OPERATIONHISTORY >>> Open operation called while another operation is open.  old: ");  
					System.out.print(openComposite);
					System.out.print("new:  "); 
					System.out.print(operation);