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diff --git a/catapult/third_party/polymer/components/web-animations-js/src/normalize-keyframes.js b/catapult/third_party/polymer/components/web-animations-js/src/normalize-keyframes.js
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@@ -0,0 +1,321 @@
+// 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(shared, testing) {
+  var shorthandToLonghand = {
+    background: [
+      'backgroundImage',
+      'backgroundPosition',
+      'backgroundSize',
+      'backgroundRepeat',
+      'backgroundAttachment',
+      'backgroundOrigin',
+      'backgroundClip',
+      'backgroundColor'
+    ],
+    border: [
+      'borderTopColor',
+      'borderTopStyle',
+      'borderTopWidth',
+      'borderRightColor',
+      'borderRightStyle',
+      'borderRightWidth',
+      'borderBottomColor',
+      'borderBottomStyle',
+      'borderBottomWidth',
+      'borderLeftColor',
+      'borderLeftStyle',
+      'borderLeftWidth'
+    ],
+    borderBottom: [
+      'borderBottomWidth',
+      'borderBottomStyle',
+      'borderBottomColor'
+    ],
+    borderColor: [
+      'borderTopColor',
+      'borderRightColor',
+      'borderBottomColor',
+      'borderLeftColor'
+    ],
+    borderLeft: [
+      'borderLeftWidth',
+      'borderLeftStyle',
+      'borderLeftColor'
+    ],
+    borderRadius: [
+      'borderTopLeftRadius',
+      'borderTopRightRadius',
+      'borderBottomRightRadius',
+      'borderBottomLeftRadius'
+    ],
+    borderRight: [
+      'borderRightWidth',
+      'borderRightStyle',
+      'borderRightColor'
+    ],
+    borderTop: [
+      'borderTopWidth',
+      'borderTopStyle',
+      'borderTopColor'
+    ],
+    borderWidth: [
+      'borderTopWidth',
+      'borderRightWidth',
+      'borderBottomWidth',
+      'borderLeftWidth'
+    ],
+    flex: [
+      'flexGrow',
+      'flexShrink',
+      'flexBasis'
+    ],
+    font: [
+      'fontFamily',
+      'fontSize',
+      'fontStyle',
+      'fontVariant',
+      'fontWeight',
+      'lineHeight'
+    ],
+    margin: [
+      'marginTop',
+      'marginRight',
+      'marginBottom',
+      'marginLeft'
+    ],
+    outline: [
+      'outlineColor',
+      'outlineStyle',
+      'outlineWidth'
+    ],
+    padding: [
+      'paddingTop',
+      'paddingRight',
+      'paddingBottom',
+      'paddingLeft'
+    ]
+  };
+
+  var shorthandExpanderElem = document.createElementNS('http://www.w3.org/1999/xhtml', 'div');
+
+  var borderWidthAliases = {
+    thin: '1px',
+    medium: '3px',
+    thick: '5px'
+  };
+
+  var aliases = {
+    borderBottomWidth: borderWidthAliases,
+    borderLeftWidth: borderWidthAliases,
+    borderRightWidth: borderWidthAliases,
+    borderTopWidth: borderWidthAliases,
+    fontSize: {
+      'xx-small': '60%',
+      'x-small': '75%',
+      'small': '89%',
+      'medium': '100%',
+      'large': '120%',
+      'x-large': '150%',
+      'xx-large': '200%'
+    },
+    fontWeight: {
+      normal: '400',
+      bold: '700'
+    },
+    outlineWidth: borderWidthAliases,
+    textShadow: {
+      none: '0px 0px 0px transparent'
+    },
+    boxShadow: {
+      none: '0px 0px 0px 0px transparent'
+    }
+  };
+
+  function antiAlias(property, value) {
+    if (property in aliases) {
+      return aliases[property][value] || value;
+    }
+    return value;
+  }
+
+  function isNotAnimatable(property) {
+    // https://w3c.github.io/web-animations/#concept-not-animatable
+    return property === 'display' || property.lastIndexOf('animation', 0) === 0 || property.lastIndexOf('transition', 0) === 0;
+  }
+
+  // This delegates parsing shorthand value syntax to the browser.
+  function expandShorthandAndAntiAlias(property, value, result) {
+    if (isNotAnimatable(property)) {
+      return;
+    }
+    var longProperties = shorthandToLonghand[property];
+    if (longProperties) {
+      shorthandExpanderElem.style[property] = value;
+      for (var i in longProperties) {
+        var longProperty = longProperties[i];
+        var longhandValue = shorthandExpanderElem.style[longProperty];
+        result[longProperty] = antiAlias(longProperty, longhandValue);
+      }
+    } else {
+      result[property] = antiAlias(property, value);
+    }
+  };
+
+  function convertToArrayForm(effectInput) {
+    var normalizedEffectInput = [];
+
+    for (var property in effectInput) {
+      if (property in ['easing', 'offset', 'composite']) {
+        continue;
+      }
+
+      var values = effectInput[property];
+      if (!Array.isArray(values)) {
+        values = [values];
+      }
+
+      var keyframe;
+      var numKeyframes = values.length;
+      for (var i = 0; i < numKeyframes; i++) {
+        keyframe = {};
+
+        if ('offset' in effectInput) {
+          keyframe.offset = effectInput.offset;
+        } else if (numKeyframes == 1) {
+          keyframe.offset = 1.0;
+        } else {
+          keyframe.offset = i / (numKeyframes - 1.0);
+        }
+
+        if ('easing' in effectInput) {
+          keyframe.easing = effectInput.easing;
+        }
+
+        if ('composite' in effectInput) {
+          keyframe.composite = effectInput.composite;
+        }
+
+        keyframe[property] = values[i];
+
+        normalizedEffectInput.push(keyframe);
+      }
+    }
+
+    normalizedEffectInput.sort(function(a, b) { return a.offset - b.offset; });
+    return normalizedEffectInput;
+  };
+
+  function normalizeKeyframes(effectInput) {
+    if (effectInput == null) {
+      return [];
+    }
+
+    if (window.Symbol && Symbol.iterator && Array.prototype.from && effectInput[Symbol.iterator]) {
+      // Handle custom iterables in most browsers by converting to an array
+      effectInput = Array.from(effectInput);
+    }
+
+    if (!Array.isArray(effectInput)) {
+      effectInput = convertToArrayForm(effectInput);
+    }
+
+    var keyframes = effectInput.map(function(originalKeyframe) {
+      var keyframe = {};
+      for (var member in originalKeyframe) {
+        var memberValue = originalKeyframe[member];
+        if (member == 'offset') {
+          if (memberValue != null) {
+            memberValue = Number(memberValue);
+            if (!isFinite(memberValue))
+              throw new TypeError('Keyframe offsets must be numbers.');
+            if (memberValue < 0 || memberValue > 1)
+              throw new TypeError('Keyframe offsets must be between 0 and 1.');
+          }
+        } else if (member == 'composite') {
+          if (memberValue == 'add' || memberValue == 'accumulate') {
+            throw {
+              type: DOMException.NOT_SUPPORTED_ERR,
+              name: 'NotSupportedError',
+              message: 'add compositing is not supported'
+            };
+          } else if (memberValue != 'replace') {
+            throw new TypeError('Invalid composite mode ' + memberValue + '.');
+          }
+        } else if (member == 'easing') {
+          memberValue = shared.normalizeEasing(memberValue);
+        } else {
+          memberValue = '' + memberValue;
+        }
+        expandShorthandAndAntiAlias(member, memberValue, keyframe);
+      }
+      if (keyframe.offset == undefined)
+        keyframe.offset = null;
+      if (keyframe.easing == undefined)
+        keyframe.easing = 'linear';
+      return keyframe;
+    });
+
+    var everyFrameHasOffset = true;
+    var looselySortedByOffset = true;
+    var previousOffset = -Infinity;
+    for (var i = 0; i < keyframes.length; i++) {
+      var offset = keyframes[i].offset;
+      if (offset != null) {
+        if (offset < previousOffset) {
+          throw new TypeError('Keyframes are not loosely sorted by offset. Sort or specify offsets.');
+        }
+        previousOffset = offset;
+      } else {
+        everyFrameHasOffset = false;
+      }
+    }
+
+    keyframes = keyframes.filter(function(keyframe) {
+      return keyframe.offset >= 0 && keyframe.offset <= 1;
+    });
+
+    function spaceKeyframes() {
+      var length = keyframes.length;
+      if (keyframes[length - 1].offset == null)
+        keyframes[length - 1].offset = 1;
+      if (length > 1 && keyframes[0].offset == null)
+        keyframes[0].offset = 0;
+
+      var previousIndex = 0;
+      var previousOffset = keyframes[0].offset;
+      for (var i = 1; i < length; i++) {
+        var offset = keyframes[i].offset;
+        if (offset != null) {
+          for (var j = 1; j < i - previousIndex; j++)
+            keyframes[previousIndex + j].offset = previousOffset + (offset - previousOffset) * j / (i - previousIndex);
+          previousIndex = i;
+          previousOffset = offset;
+        }
+      }
+    }
+    if (!everyFrameHasOffset)
+      spaceKeyframes();
+
+    return keyframes;
+  }
+
+  shared.convertToArrayForm = convertToArrayForm;
+  shared.normalizeKeyframes = normalizeKeyframes;
+
+  if (WEB_ANIMATIONS_TESTING) {
+    testing.normalizeKeyframes = normalizeKeyframes;
+  }
+
+})(webAnimationsShared, webAnimationsTesting);