[DevTools] Support multiple sessions in Target domain

third_party/WebKit/LayoutTests/inspector-protocol/worker/exception-from-worker-contains-stack.js

Index: third_party/WebKit/LayoutTests/inspector-protocol/worker/exception-from-worker-contains-stack.js
diff --git a/third_party/WebKit/LayoutTests/inspector-protocol/worker/exception-from-worker-contains-stack.js b/third_party/WebKit/LayoutTests/inspector-protocol/worker/exception-from-worker-contains-stack.js
index 37b6fa13618bb93cfff8f77fa558a42acb31eee8..9fe244591efb1b8dcceb30907403217185352360 100644
--- a/third_party/WebKit/LayoutTests/inspector-protocol/worker/exception-from-worker-contains-stack.js
+++ b/third_party/WebKit/LayoutTests/inspector-protocol/worker/exception-from-worker-contains-stack.js
@@ -2,18 +2,18 @@
   let {page, session, dp} = await testRunner.startBlank('Tests that console message from worker contains stack trace.');
 
   var workerRequestId = 1;
-  function sendCommandToWorker(method, params, workerId) {
+  function sendCommandToWorker(method, params, workerSessionId) {
     dp.Target.sendMessageToTarget({
-      targetId: workerId,
+      sessionId: workerSessionId,
       message: JSON.stringify({ method: method, params: params, id: workerRequestId++ })
     });
   }
 
   var waitForWorkers = 2;
   dp.Target.onAttachedToTarget(messageObject => {
-    var workerId = messageObject['params']['targetInfo']['targetId'];
+    var workerSessionId = messageObject.params.sessionId;
     testRunner.log('Worker created');
-    sendCommandToWorker('Runtime.enable', {}, workerId);
+    sendCommandToWorker('Runtime.enable', {}, workerSessionId);
     if (!--waitForWorkers)
       session.evaluate('worker1.postMessage(239);worker2.postMessage(42);');
   });