Timeline: fix reset logic of TracingTimelineModel & co

Source/devtools/front_end/timeline/TracingTimelineModel.js

Index: Source/devtools/front_end/timeline/TracingTimelineModel.js
diff --git a/Source/devtools/front_end/timeline/TracingTimelineModel.js b/Source/devtools/front_end/timeline/TracingTimelineModel.js
index a2db0039c4f9eb52d124dcde3ba0a607e97b677c..6c950d3524a95ebf843b619db67051c9b4fd446a 100644
--- a/Source/devtools/front_end/timeline/TracingTimelineModel.js
+++ b/Source/devtools/front_end/timeline/TracingTimelineModel.js
@@ -101,6 +101,7 @@ WebInspector.TracingTimelineModel.prototype = {
      */
     startRecording: function(captureStacks, captureMemory)
     {
+        this.reset();

[yurys, 2014/06/10 07:04:27]

This should go into _startRecordingWithCategories

         var categories;
         if (WebInspector.experimentsSettings.timelineTracingMode.isEnabled()) {
             categories = WebInspector.TracingTimelineModel.defaultTracingCategoryFilter;
@@ -124,6 +125,7 @@ WebInspector.TracingTimelineModel.prototype = {
      */
     setEventsForTest: function(sessionId, events)
     {
+        this.reset();
         this._didStartRecordingTraceEvents();
         this._tracingModel.setEventsForTest(sessionId, events);
         this._didStopRecordingTraceEvents();
@@ -139,7 +141,6 @@ WebInspector.TracingTimelineModel.prototype = {
 
     _didStartRecordingTraceEvents: function()
     {
-        this.reset();
         this.dispatchEventToListeners(WebInspector.TimelineModel.Events.RecordingStarted);
     },