Inline scripts were extracted from Polymer elements.

third_party/polymer/components-chromium/paper-menu-button/paper-menu-button-extracted.js

+Polymer('paper-menu-button-overlay-container');;
+
+    Polymer('paper-menu-button', {
+
+      publish: {
+
+        /**
+         * If true, this menu is currently visible.
+         *
+         * @attribute opened
+         * @type boolean
+         * @default false
+         */
+        opened: { value: false, reflect: true },
+
+        /**
+         * The horizontal alignment of the pulldown menu relative to the button.
+         *
+         * @attribute halign
+         * @type 'left' | 'right'
+         * @default 'left'
+         */
+        halign: { value: 'left', reflect: true },
+
+        /**
+         * The vertical alignment of the pulldown menu relative to the button.
+         *
+         * @attribute valign
+         * @type 'bottom' | 'top'
+         * @default 'top'
+         */
+        valign: {value: 'top', reflect: true}
+      },
+
+      /**
+       * The URL of an image for the icon.  Should not use `icon` property
+       * if you are using this property.
+       *
+       * @attribute src
+       * @type string
+       * @default ''
+       */
+      src: '',
+
+      /**
+       * Specifies the icon name or index in the set of icons available in
+       * the icon set.  Should not use `src` property if you are using this
+       * property.
+       *
+       * @attribute icon
+       * @type string
+       * @default ''
+       */
+      icon: '',
+
+      slow: false,
+
+      tapAction: function() {
+        if (this.disabled) {
+          return;
+        }
+
+        this.super();
+        this.toggle();
+      },
+
+      /**
+       * Toggle the opened state of the menu.
+       *
+       * @method toggle
+       */
+      toggle: function() {
+        this.opened = !this.opened;
+      }
+
+    });
+