Pull web-animations-js into third-party via the third_party/polymer/reproduce.sh script. Add necess…

third_party/web-animations-js/sources/src/font-weight-handler.js

Index: third_party/web-animations-js/sources/src/font-weight-handler.js
diff --git a/third_party/web-animations-js/sources/src/font-weight-handler.js b/third_party/web-animations-js/sources/src/font-weight-handler.js
new file mode 100644
index 0000000000000000000000000000000000000000..4760486a66c2e973cf30a2f154a77536ba3c507c
--- /dev/null
+++ b/third_party/web-animations-js/sources/src/font-weight-handler.js
@@ -0,0 +1,42 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+// limitations under the License.
+
+(function(scope) {
+  function parse(string) {
+    var out = Number(string);
+    if (isNaN(out) || out < 100 || out > 900 || out % 100 !== 0) {
+      return;
+    }
+    return out;
+  }
+
+  function toCss(value) {
+    value = Math.round(value / 100) * 100;
+    value = scope.clamp(100, 900, value);
+    if (value === 400) {
+      return 'normal';
+    }
+    if (value === 700) {
+      return 'bold';
+    }
+    return String(value);
+  }
+
+  function merge(left, right) {
+    return [left, right, toCss];
+  }
+
+  scope.addPropertiesHandler(parse, merge, ['font-weight']);
+
+})(webAnimations1);