Upgrade to 1.0 and switch clients to dom-repeat where needed.

third_party/polymer/v0_8/components-chromium/paper-toolbar/paper-toolbar-extracted.js

 
 
   (function() {
 
     'use strict';
 
     function classNames(obj) {
       var classNames = [];
       for (var key in obj) {
         if (obj.hasOwnProperty(key) && obj[key]) {
           classNames.push(key);
         }
       }
 
       return classNames.join(' ');
     }
 
     Polymer({
 
       is: 'paper-toolbar',
 
-      enableCustomStyleProperties: true,
+      hostAttributes: {
+        'role': 'toolbar'
+      },
 
       properties: {
 
         /**
          * Controls how the items are aligned horizontally when they are placed
          * at the bottom.
          * Options are `start`, `center`, `end`, `justified` and `around`.
          *
          * @attribute bottomJustify
          * @type string
@@ skipping 26 matching lines @@
          * @type string
          * @default ''
          */
         middleJustify: {
           type: String,
           value: ''
         }
 
       },
 
+      attached: function() {
+        this._observer = this._observe(this);
+        this._updateAriaLabelledBy();
+      },
+
+      detached: function() {
+        if (this._observer) {
+          this._observer.disconnect();
+        }
+      },
+
+      _observe: function(node) {
+        var observer = new MutationObserver(function() {
+          this._updateAriaLabelledBy();
+        }.bind(this));
+        observer.observe(node, {
+          childList: true,
+          subtree: true
+        });
+        return observer;
+      },
+
+      _updateAriaLabelledBy: function() {
+        var labelledBy = [];
+        var contents = Polymer.dom(this.root).querySelectorAll('content');
+        for (var content, index = 0; content = contents[index]; index++) {
+          var nodes = Polymer.dom(content).getDistributedNodes();
+          for (var node, jndex = 0; node = nodes[jndex]; jndex++) {
+            if (node.hasAttribute && node.hasAttribute('title')) {
+              if (node.id) {
+                labelledBy.push(node.id);
+              } else {
+                var id = 'paper-toolbar-label-' + Math.floor(Math.random() * 10000);
+                node.id = id;
+                labelledBy.push(id);
+              }
+            }
+          }
+        }
+        if (labelledBy.length > 0) {
+          this.setAttribute('aria-labelledby', labelledBy.join(' '));
+        }
+      },
+
       _computeBarClassName: function(barJustify) {
         var classObj = {
           center: true,
           horizontal: true,
           layout: true,
           'toolbar-tools': true
         };
 
         // If a blank string or any falsy value is given, no other class name is
         // added.
         if (barJustify) {
           var justifyClassName = (barJustify === 'justified') ?
               barJustify :
               barJustify + '-justified';
 
           classObj[justifyClassName] = true;
         }
 
         return classNames(classObj);
       }
 
     });
 
   }());