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

third_party/polymer/v0_8/components/promise-polyfill/Gruntfile.js

+module.exports = function(grunt) {
+
+        grunt.initConfig({
+                pkg: grunt.file.readJSON('package.json'),
+
+                uglify: {
+                        options: {
+                                banner: '/*! <%= pkg.name %> <%= pkg.version %> */\n'
+                        },
+                        dist: {
+                                files: {
+                                        'Promise.min.uglify.js': ['Promise.js']
+                                }
+                        }
+                },
+
+    closurecompiler: {
+      options: {
+        compilation_level: 'ADVANCED_OPTIMIZATIONS',
+      },
+      dist: {
+        files: {
+          'Promise.min.js': ['Promise.js']
+        }
+      }
+    },
+
+    bytesize: {
+      dist: {
+        src: ['Promise*.js']
+      }
+    }
+        });
+
+        grunt.loadNpmTasks('grunt-contrib-uglify');
+        grunt.loadNpmTasks('grunt-closurecompiler');
+        grunt.loadNpmTasks('grunt-bytesize');
+
+        grunt.registerTask('build', ['closurecompiler', 'bytesize']);
+};