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

third_party/WebKit/LayoutTests/imported/wpt/IndexedDB/idbworker.js

 var db
 
 self.addEventListener('message', MessageHandler, false)
 
 function MessageHandler(e)
 {
     var open_rq, idb = self.indexedDB || self.msIndexedDB || self.webkitIndexedDB || self.mozIndexedDB
 
     if (!idb)
     {
@@ skipping 14 matching lines @@
         db = e.target.result
         db.onerror = function() { self.postMessage("db.error") }
         db.transaction("store").objectStore("store").get(1).onsuccess = function(e) {
             self.postMessage(e.target.result)
             db.close()
         }
     }
     open_rq.onerror = function() { self.postMessage("open.error") }
     open_rq.onblocked = function() { self.postMessage("open.blocked") }
 }