Test that DevTools commands can be handled on worker thread when it is in a tight loop

LayoutTests/inspector-protocol/debugger/debugger-pause-dedicated-worker-loop.html

Index: LayoutTests/inspector-protocol/debugger/debugger-pause-dedicated-worker-loop.html
diff --git a/LayoutTests/inspector-protocol/debugger/debugger-evaluate-in-worker-while-pause-in-page.html b/LayoutTests/inspector-protocol/debugger/debugger-pause-dedicated-worker-loop.html
similarity index 59%
copy from LayoutTests/inspector-protocol/debugger/debugger-evaluate-in-worker-while-pause-in-page.html
copy to LayoutTests/inspector-protocol/debugger/debugger-pause-dedicated-worker-loop.html
index a0ff638e372b6a1fea045a9c37b0734b484b2660..354d1347262689be6ba90efa7be8afb306e8f314 100644
--- a/LayoutTests/inspector-protocol/debugger/debugger-evaluate-in-worker-while-pause-in-page.html
+++ b/LayoutTests/inspector-protocol/debugger/debugger-pause-dedicated-worker-loop.html
@@ -4,17 +4,10 @@
 <script>
 
 var worker;
-
-function testFunction()
-{
-    debugger;
-}
-
 function startWorkerAndRunTest()
 {
-    worker = new Worker("resources/dedicated-worker.js");
+    worker = new Worker("resources/dedicated-worker-loop.js");
     worker.onmessage = function(event) { };
-    worker.postMessage(1);
     log("Started worker");
     runTest();
 }
@@ -23,7 +16,6 @@ function test()
 {
     var workerId;
     var workerRequestId = 1;
-
     function sendCommandToWorker(method, params)
     {
         InspectorTest.sendCommand("Worker.sendMessageToWorker",
@@ -36,17 +28,6 @@ function test()
         return workerRequestId++;
     }
 
-    InspectorTest.sendCommand("Debugger.enable", {});
-    InspectorTest.eventHandler["Debugger.paused"] = handleDebuggerPausedInTestFunction;
-    InspectorTest.sendCommand("Runtime.evaluate", { "expression": "testFunction()" });
-
-    function handleDebuggerPausedInTestFunction(messageObject)
-    {
-        InspectorTest.log("Paused on 'debugger;'");
-        InspectorTest.sendCommand("Worker.enable", {}, didEnableWorkerDebugging);
-
-    }
-
     function didEnableWorkerDebugging(messageObject)
     {
         if ("error" in messageObject) {
@@ -54,8 +35,10 @@ function test()
             InspectorTest.completeTest();
         }
     }
+    InspectorTest.sendCommand("Worker.enable", {}, didEnableWorkerDebugging);
 
-    var savedWorkerRequestId = -1;
+    var evaluateRequestId = -1;
+    var debuggerEnableRequestId = -1;
     InspectorTest.eventHandler["Worker.workerCreated"] = function(messageObject)
     {
         workerId = messageObject["params"]["workerId"];
@@ -65,16 +48,30 @@ function test()
         function didConnectToWorker(messageObject)
         {
             InspectorTest.log("didConnectToWorker");
-            savedWorkerRequestId = sendCommandToWorker("Runtime.evaluate", { "expression": "1+1"});
+            // Enable debugger so that V8 can interrupt and handle inspector commands while there is a script running in a tight loop.
+            debuggerEnableRequestId = sendCommandToWorker("Debugger.enable", {});
         }
     }
 
     InspectorTest.eventHandler["Worker.dispatchMessageFromWorker"] = function(messageObject)
     {
         var message = messageObject["params"]["message"];
-        if (message["id"] === savedWorkerRequestId) {
+        if (message["id"] === debuggerEnableRequestId) {
+            InspectorTest.log("Did enable debugger");
+            // Start tight loop in the worker.
+            InspectorTest.sendCommand("Runtime.evaluate", { "expression": "worker.postMessage(1)" }, didPostMessageToWorker);
+            function didPostMessageToWorker()
+            {
+                InspectorTest.log("Did post message to worker");
+                evaluateRequestId = sendCommandToWorker("Runtime.evaluate", { "expression": "message_id > 1"});
+            }
+        }
+        if (message["id"] === evaluateRequestId) {
             var value = message["result"]["result"]["value"];
-            InspectorTest.log("Successfully evaluated, result: " + value);
+            if (value === true)
+                InspectorTest.log("SUCCESS: evaluated, result: " + value);
+            else
+                InspectorTest.log("FAIL: evaluated, result: " + value);
             InspectorTest.completeTest();
         }
     }