Move the html directory from web-platform-tests/ to wpt/.

third_party/WebKit/LayoutTests/imported/wpt/html/dom/original-harness.js

 var ReflectionHarness = {};
 
 // @private
 ReflectionHarness.passed = document.getElementById("passed");
 ReflectionHarness.failed = document.getElementById("failed");
 
 /**
  * Should we report a failure for unexpected exceptions, or just rethrow them?
  * The original test framework reports an exception, but testharness.js doesn't
  * want that.
@@ skipping 312 matching lines @@
       continue;
     }
 
     if (key in elements) {
       elements[key] = elements[key].concat(src[key]);
     } else {
       elements[key] = src[key];
     }
   }
 }