Roll third_party/polymer.

third_party/polymer/v1_0/components-chromium/paper-dropdown-menu/paper-dropdown-menu-light-extracted.js

 (function() {
       'use strict';
 
       Polymer({
-        is: 'paper-dropdown-menu',
-
-        /**
-         * Fired when the dropdown opens.
-         *
-         * @event paper-dropdown-open
-         */
-
-        /**
-         * Fired when the dropdown closes.
-         *
-         * @event paper-dropdown-close
-         */
+        is: 'paper-dropdown-menu-light',
 
         behaviors: [
           Polymer.IronButtonState,
           Polymer.IronControlState,
+          Polymer.PaperRippleBehavior,
           Polymer.IronFormElementBehavior,
           Polymer.IronValidatableBehavior
         ],
 
         properties: {
           /**
            * The derived "label" of the currently selected item. This value
            * is the `label` property on the selected item if set, or else the
            * trimmed text content of the selected item.
            */
@@ skipping 17 matching lines @@
           },
 
           /**
            * The value for this element that will be used when submitting in
            * a form. It is read only, and will always have the same value
            * as `selectedItemLabel`.
            */
           value: {
             type: String,
             notify: true,
-            readOnly: true
+            readOnly: true,
+            observer: '_valueChanged',
           },
 
           /**
            * The label for the dropdown.
            */
           label: {
             type: String
           },
 
           /**
            * The placeholder for the dropdown.
            */
           placeholder: {
             type: String
           },
 
           /**
-           * The error message to display when invalid.
-           */
-          errorMessage: {
-              type: String
-          },
-
-          /**
            * True if the dropdown is open. Otherwise, false.
            */
           opened: {
             type: Boolean,
             notify: true,
             value: false,
             observer: '_openedChanged'
           },
 
           /**
@@ skipping 33 matching lines @@
             value: 'right'
           },
 
           /**
            * The orientation against which to align the menu dropdown
            * vertically relative to the dropdown trigger.
            */
           verticalAlign: {
             type: String,
             value: 'top'
+          },
+
+          hasContent: {
+            type: Boolean,
+            readOnly: true
           }
         },
 
         listeners: {
           'tap': '_onTap'
         },
 
         keyBindings: {
           'up down': 'open',
           'esc': 'close'
@@ skipping 113 matching lines @@
         _getValidity: function(_value) {
           return this.disabled || !this.required || (this.required && !!this.value);
         },
 
         _openedChanged: function() {
           var openState = this.opened ? 'true' : 'false';
           var e = this.contentElement;
           if (e) {
             e.setAttribute('aria-expanded', openState);
           }
-        }
+        },
+
+        _computeLabelClass: function(noLabelFloat, alwaysFloatLabel, hasContent) {
+          var cls = '';
+          if (noLabelFloat === true) {
+            return hasContent ? 'label-is-hidden' : '';
+          }
+
+          if (hasContent || alwaysFloatLabel === true) {
+            cls += ' label-is-floating';
+          }
+          return cls;
+        },
+
+        _valueChanged: function() {
+          // Only update if it's actually different.
+          if (this.$.input && this.$.input.textContent !== this.value) {
+            this.$.input.textContent = this.value;
+          }
+
+          if (this.value || this.value === 0 || this.value === false) {
+            this._setHasContent(true);
+          } else {
+            this._setHasContent(false);
+          }
+        },
       });
     })();