Inline scripts were extracted from Polymer elements.

third_party/polymer/components-chromium/core-menu/core-submenu-extracted.js

+
+
+  Polymer('core-submenu', {
+
+    publish: {
+      active: {value: false, reflect: true}
+    },
+
+    opened: false,
+
+    get items() {
+      return this.$.submenu.items;
+    },
+
+    hasItems: function() {
+      return !!this.items.length;
+    },
+
+    unselectAllItems: function() {
+      this.$.submenu.selected = null;
+      this.$.submenu.clearSelection();
+    },
+
+    activeChanged: function() {
+      if (this.hasItems()) {
+        this.opened = this.active;
+      }
+      if (!this.active) {
+        this.unselectAllItems();
+      }
+    },
+    
+    toggle: function() {
+      this.opened = !this.opened;
+    },
+
+    activate: function() {
+      if (this.hasItems() && this.active) {
+        this.toggle();
+        this.unselectAllItems();
+      }
+    }
+    
+  });
+