/usr/share/javascript/dijit/layout/ is in libjs-dojo-dijit 1.10.4+dfsg-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/javascript/dijit/layout/AccordionContainer.js
/usr/share/javascript/dijit/layout/AccordionPane.js
/usr/share/javascript/dijit/layout/BorderContainer.js
/usr/share/javascript/dijit/layout/ContentPane.js
/usr/share/javascript/dijit/layout/LayoutContainer.js
/usr/share/javascript/dijit/layout/LinkPane.js
/usr/share/javascript/dijit/layout/ScrollingTabController.js
/usr/share/javascript/dijit/layout/SplitContainer.js
/usr/share/javascript/dijit/layout/StackContainer.js
/usr/share/javascript/dijit/layout/StackController.js
/usr/share/javascript/dijit/layout/TabContainer.js
/usr/share/javascript/dijit/layout/TabController.js
/usr/share/javascript/dijit/layout/_ContentPaneResizeMixin.js
/usr/share/javascript/dijit/layout/_LayoutWidget.js
/usr/share/javascript/dijit/layout/_TabContainerBase.js
/usr/share/javascript/dijit/layout/templates/
/usr/share/javascript/dijit/layout/templates/AccordionButton.html
/usr/share/javascript/dijit/layout/templates/ScrollingTabController.html
/usr/share/javascript/dijit/layout/templates/TabContainer.html
/usr/share/javascript/dijit/layout/templates/_ScrollingTabControllerButton.html
/usr/share/javascript/dijit/layout/templates/_TabButton.html
/usr/share/javascript/dijit/layout/utils.js