Update http/resources/teshharnessreport.js to match CL 109763007.

testharness.js is used for http tests but the changes made to the report
file were not done to the one in the http/resources/ directory.

BUG=268711

Review URL: https://codereview.chromium.org/302093010

git-svn-id: svn://svn.chromium.org/blink/trunk@175288 bbb929c8-8fbe-4397-9dbb-9b2b20218538