[DevTools] Migrate inspector-protocol/debugger tests to new harness

third_party/WebKit/LayoutTests/inspector-protocol/debugger/debugger-step-into-dedicated-worker.js

+(async function(testRunner) {
+  let {page, session, dp} = await testRunner.startBlank(`Tests that dedicated worker won't crash on attempt to step into.Bug 232392.`);
+
+  var workerId;
+  var workerRequestId = 1;
+  function sendCommandToWorker(method, params) {
+    var message = {method, params, id: workerRequestId};
+    dp.Target.sendMessageToTarget({targetId: workerId, message: JSON.stringify(message)});
+    return workerRequestId++;
+  }
+
+  dp.Target.setAutoAttach({autoAttach: true, waitForDebuggerOnStart: true});
+  await session.evaluate(`
+    window.worker = new Worker('${testRunner.url('resources/dedicated-worker-step-into.js')}');
+    window.worker.onmessage = function(event) { };
+    window.worker.postMessage(1);
+  `);
+  testRunner.log('Started worker');
+
+  var messageObject = await dp.Target.onceAttachedToTarget();
+  workerId = messageObject.params.targetInfo.targetId;
+  testRunner.log('Worker created');
+
+  sendCommandToWorker('Debugger.enable', {});
+  sendCommandToWorker('Runtime.runIfWaitingForDebugger', {});
+
+  var pauseCount = 0;
+  dp.Target.onReceivedMessageFromTarget(async messageObject => {
+    var message = JSON.parse(messageObject.params.message);
+    if (message.method === 'Debugger.paused') {
+      testRunner.log('SUCCESS: Worker paused');
+      if (++pauseCount === 1) {
+        testRunner.log('Stepping into...');
+        sendCommandToWorker('Debugger.stepInto', {});
+      } else {
+        sendCommandToWorker('Debugger.disable', {});
+        testRunner.completeTest();
+      }
+    }
+  });
+})