code: function initCombine(common_js, is_common) {
  	combined_list = {};
  	if (common_js && !is_common) {
  		for (var k in common_combined) {
  			combined_list[k] = true;
  		}
  	}
  	file_tree = ['/* file tree:'];
  	tree_deep = 0;
  	contents = '';
  }
docs: 初始化合并