[dedicated.https.html?worker=dedicated&q=webgpu:api,operation,buffers,map_ArrayBuffer:postMessage:*]
  implementation-status: backlog
  [:transfer=false;mapMode="READ"]
    expected: FAIL

  [:transfer=false;mapMode="WRITE"]

  [:transfer=true;mapMode="READ"]
    expected: FAIL

  [:transfer=true;mapMode="WRITE"]
    expected: FAIL
