DevTools: Switch to using fast stack iterator to collect stacks during timeline recording.

third_party/WebKit/LayoutTests/http/tests/inspector/timeline-test.js

 var initialize_Timeline = function() {
 
 InspectorTest.preloadPanel("timeline");
 WebInspector.TempFile = InspectorTest.TempFileMock;
 
 // Scrub values when printing out these properties in the record or data field.
 InspectorTest.timelinePropertyFormatters = {
     children: "formatAsTypeName",
     endTime: "formatAsTypeName",
     requestId: "formatAsTypeName",
@@ skipping 53 matching lines @@
 InspectorTest.timelineModel = function()
 {
     return WebInspector.panels.timeline._model;
 }
 
 InspectorTest.timelineFrameModel = function()
 {
     return WebInspector.panels.timeline._frameModel;
 }
 
-InspectorTest.startTimeline = function(callback)
+InspectorTest.startTimeline = function(callback, disableSampling)

[caseq, 2016/01/26 01:22:04]

callback should always be last.

[alph, 2016/01/26 02:04:51]

Acknowledged.

 {
     var panel = WebInspector.panels.timeline;
     function onRecordingStarted()
     {
-        panel._model.removeEventListener(WebInspector.TimelineModel.Events.RecordingStarted, onRecordingStarted, this)
+        panel._model.removeEventListener(WebInspector.TimelineModel.Events.RecordingStarted, onRecordingStarted, this);
         callback();
     }
-    panel._model.addEventListener(WebInspector.TimelineModel.Events.RecordingStarted, onRecordingStarted, this)
-    panel._captureJSProfileSetting.set(false);
+    panel._model.addEventListener(WebInspector.TimelineModel.Events.RecordingStarted, onRecordingStarted, this);
+    panel._captureJSProfileSetting.set(!disableSampling);
     panel._toggleRecording();
 };
 
 InspectorTest.stopTimeline = function(callback)
 {
     var panel = WebInspector.panels.timeline;
     function didStop()
     {
         panel._model.removeEventListener(WebInspector.TimelineModel.Events.RecordingStopped, didStop, this)
         InspectorTest.runAfterPendingDispatches(callback);
     }
     panel._model.addEventListener(WebInspector.TimelineModel.Events.RecordingStopped, didStop, this)
     panel._toggleRecording();
 };
 
-InspectorTest.evaluateWithTimeline = function(actions, doneCallback)
+InspectorTest.evaluateWithTimeline = function(actions, doneCallback, disableSampling)
 {
-    InspectorTest.startTimeline(step1);
+    InspectorTest.startTimeline(step1, disableSampling);
     function step1()
     {
         InspectorTest.evaluateInPage(actions, step2);
     }
 
     function step2()
     {
         InspectorTest.stopTimeline(doneCallback);
     }
 }
@@ skipping 287 matching lines @@
         if (!--count) {
             callback();
             return;
         }
         if (window.testRunner)
             testRunner.capturePixelsAsyncThen(requestAnimationFrame.bind(window, makeFrame));
         else
             window.requestAnimationFrame(makeFrame);
     }
 }