Move web-platform-tests to wpt (part 1 of 2)

third_party/WebKit/LayoutTests/imported/wpt/resources/testharness.css

 html {
     font-family:DejaVu Sans, Bitstream Vera Sans, Arial, Sans;
 }
 
 #log .warning,
 #log .warning a {
   color: black;
   background: yellow;
 }
 
@@ skipping 82 matching lines @@
     color:red;
 }
 
 span.timeout {
     color:red;
 }
 
 span.ok, span.timeout, span.error {
     font-variant:small-caps;
 }