CSS Animations: Simplify interpolation test results under test-runner

LayoutTests/animations/interpolation/resources/interpolation-test.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 85 matching lines @@
       }
       style.parentNode.removeChild(style);
     } else {
       var resultString = '';
       for (var i = 0; i < targets.length; i++) {
         resultString += targets[i].getResultString() + '\n';
       }
       var results = document.createElement('div');
       results.style.whiteSpace = 'pre';
       results.textContent = resultString;
+      results.id = 'results';
       document.body.appendChild(results);
     }
   }
 
   function convertToReference() {
     console.assert(isRefTest);
     var scripts = document.querySelectorAll('script');
     for (var i = 0; i < scripts.length; i++) {
       scripts[i].parentNode.removeChild(scripts[i]);
     }
@@ skipping 160 matching lines @@
 
   var finished = false;
   function finishTest() {
     finished = true;
     dumpResults();
     if (afterTestCallback) {
       afterTestCallback();
     }
     if (window.testRunner) {
       if (!isRefTest) {
+        var results = document.querySelector('#results');
+        document.documentElement.textContent = '';
+        document.documentElement.appendChild(results);
         testRunner.dumpAsText();
       }
       testRunner.notifyDone();
     }
   }
 
   if (window.testRunner) {
     testRunner.waitUntilDone();
   }
 
@@ skipping 49 matching lines @@
       finishTest();
     }, 10000);
   }
 
   window.runAsRefTest = runAsRefTest;
   window.testInterpolationAt = testInterpolationAt;
   window.assertInterpolation = assertInterpolation;
   window.convertToReference = convertToReference;
   window.afterTest = afterTest;
 })();