Web Animations: Add SVGIntegerOptionalIntegerInterpolationType

third_party/WebKit/LayoutTests/animations/svg-attribute-interpolation/resources/interpolation-test.js

 /* Copyright 2015 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * Exported function:
  *  - assertAttributeInterpolation({property, from, to, [fromComposite], [toComposite], [underlying]}, [{at: fraction, is: value}])
  *        Constructs a test case for each fraction that asserts the expected value
  *        equals the value produced by interpolation between from and to composited
  *        onto underlying by fromComposite and toComposite respectively using
  *        SMIL and Web Animations.
@@ skipping 392 matching lines @@
           assertionCode += `  to: neutralKeyframe,\n`;
         } else {
           assertionCode +=
             `  to: '${params.to}',\n` +
             `  fromComposite: '${params.fromComposite}',\n`;
         }
 
         assertionCode += `\n}, [\n`;
 
         rebaseline.appendChild(document.createTextNode(assertionCode));
-        var rebaselineExpectation;
-        rebaseline.appendChild(rebaselineExpectation = document.createTextNode(''));
+        var rebaselineExpectation = document.createTextNode('');
+        rebaseline.appendChild(rebaselineExpectation);
         rebaseline.appendChild(document.createTextNode(']);\n\n'));
       }
 
       for (var method of ['SMIL', 'Web Animations']) {
         if (method === 'SMIL' && params.fromComposite !== params.toComposite) {
           continue;
         }
         createElement('pre', container).textContent = `${method}: ${description}`;
         var smilContainer = createElement('div', container);
         for (var expectation of interpolationTest.expectations) {
@@ skipping 46 matching lines @@
   }).then(() => {
     var asyncHandle = async_test('This test uses interpolation-test.js.')
     requestAnimationFrame(() => {
       runTests().then(() => asyncHandle.done());
     });
   });
 
   window.assertAttributeInterpolation = assertAttributeInterpolation;
   window.neutralKeyframe = neutralKeyframe;
 })();