[DevTools] Support multiple sessions in Target domain

third_party/WebKit/LayoutTests/inspector-protocol/debugger/debugger-setTimeout-sourceUrl-dedicated-worker-loop.html

Index: third_party/WebKit/LayoutTests/inspector-protocol/debugger/debugger-setTimeout-sourceUrl-dedicated-worker-loop.html
diff --git a/third_party/WebKit/LayoutTests/inspector-protocol/debugger/debugger-setTimeout-sourceUrl-dedicated-worker-loop.html b/third_party/WebKit/LayoutTests/inspector-protocol/debugger/debugger-setTimeout-sourceUrl-dedicated-worker-loop.html
index fd20f46d740d29bae107d0f3a5480806a5835201..a2eaf82831fc68924be27f4f5cdb260bda69e559 100644
--- a/third_party/WebKit/LayoutTests/inspector-protocol/debugger/debugger-setTimeout-sourceUrl-dedicated-worker-loop.html
+++ b/third_party/WebKit/LayoutTests/inspector-protocol/debugger/debugger-setTimeout-sourceUrl-dedicated-worker-loop.html
@@ -13,13 +13,13 @@ function startWorkerAndRunTest()
 
 function test()
 {
-    var workerId;
+    var workerSessionId;
     var workerRequestId = 1;
     function sendCommandToWorker(method, params)
     {
         InspectorTest.sendCommand("Target.sendMessageToTarget",
             {
-                "targetId": workerId,
+                "sessionId": workerSessionId,
                 "message": JSON.stringify({ "method": method,
                                             "params": params,
                                             "id": workerRequestId })
@@ -39,7 +39,7 @@ function test()
     var debuggerEnableRequestId = -1;
     InspectorTest.eventHandler["Target.attachedToTarget"] = function(messageObject)
     {
-        workerId = messageObject["params"]["targetInfo"]["targetId"];
+        workerSessionId = messageObject["params"]["sessionId"];
         InspectorTest.log("Worker created");
         InspectorTest.log("didConnectToWorker");
         debuggerEnableRequestId = sendCommandToWorker("Debugger.enable", {});