DevTools: switch Timeline frontend into buffered mode and remove the corresponding experiment.

Source/devtools/front_end/timeline/TimelinePanel.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 262 matching lines @@
     _frameModel: function()
     {
         if (this._lazyFrameModel)
             return this._lazyFrameModel;
         if (this._tracingModel) {
             var tracingFrameModel = new WebInspector.TracingTimelineFrameModel();
             tracingFrameModel.addTraceEvents(this._tracingTimelineModel.inspectedTargetEvents(), this._tracingModel.sessionId() || "");
             this._lazyFrameModel = tracingFrameModel;
         } else {
             var frameModel = new WebInspector.TimelineFrameModel();
-            frameModel.setMergeRecords(!WebInspector.experimentsSettings.timelineNoLiveUpdate.isEnabled() || !this._recordingInProgress);
             frameModel.addRecords(this._model.records());
             this._lazyFrameModel = frameModel;
         }
         return this._lazyFrameModel;
     },
 
     /**
      * @return {!WebInspector.TimelineView}
      */
     _timelineView: function()
@@ skipping 405 matching lines @@
         WebInspector.inspectorView.setCurrentPanelLocked(!enabled);
     },
 
     /**
      * @param {boolean} userInitiated
      */
     _startRecording: function(userInitiated)
     {
         this._userInitiatedRecording = userInitiated;
         this._model.startRecording(this._captureStacksSetting.get(), this._captureMemorySetting.get(), this._captureLayersAndPicturesSetting && this._captureLayersAndPicturesSetting.get());
-        if (WebInspector.experimentsSettings.timelineNoLiveUpdate.isEnabled() && this._lazyFrameModel)
+        if (this._lazyFrameModel)
             this._lazyFrameModel.setMergeRecords(false);
 
         for (var i = 0; i < this._overviewControls.length; ++i)
             this._overviewControls[i].timelineStarted();
 
         if (userInitiated)
             WebInspector.userMetrics.TimelineStarted.record();
         this._setUIControlsEnabled(false);
     },
 
@@ skipping 75 matching lines @@
         for (var i = 0; i < this._currentViews.length; ++i)
             this._currentViews[i].reset();
         for (var i = 0; i < this._overviewControls.length; ++i)
             this._overviewControls[i].reset();
         this._updateSelectedRangeStats();
     },
 
     _onRecordingStarted: function()
     {
         this._updateToggleTimelineButton(true);
-        if (WebInspector.experimentsSettings.timelineNoLiveUpdate.isEnabled())
-            this._updateProgress(WebInspector.UIString("%d events collected", 0));
+        this._updateProgress(WebInspector.UIString("%d events collected", 0));
     },
 
     _recordingInProgress: function()
     {
         return this.toggleTimelineButton.toggled;
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _onRecordingProgress: function(event)
     {
-        if (!WebInspector.experimentsSettings.timelineNoLiveUpdate.isEnabled())
-            return;
         this._updateProgress(WebInspector.UIString("%d events collected", event.data));
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _onTracingBufferUsage: function(event)
     {
         var usage = /** @type {number} */ (event.data);
         this._updateProgress(WebInspector.UIString("Buffer usage %d%", Math.round(usage * 100)));
@@ skipping 20 matching lines @@
         if (this._progressElement)
             this._progressElement.remove();
         delete this._progressElement;
     },
 
     _onRecordingStopped: function()
     {
         this._stopPending = false;
         this._updateToggleTimelineButton(false);
         if (this._lazyFrameModel) {
+            this._lazyFrameModel.reset();
             if (this._tracingTimelineModel) {
-                this._lazyFrameModel.reset();
                 this._lazyFrameModel.addTraceEvents(this._tracingTimelineModel.inspectedTargetEvents(), this._tracingModel.sessionId());
                 this._overviewPane.update();
-            } else if (WebInspector.experimentsSettings.timelineNoLiveUpdate.isEnabled()) {
-                this._lazyFrameModel.reset();
+            } else {
                 this._lazyFrameModel.addRecords(this._model.records());
             }
         }
         if (this._tracingTimelineModel) {
             this.requestWindowTimes(this._tracingTimelineModel.minimumRecordTime(), this._tracingTimelineModel.maximumRecordTime());
             this._refreshViews();
         }
         this._hideProgressPane();
     },
 
@@ skipping 604 matching lines @@
      * @param {!WebInspector.TimelineModel.Record} record
      * @return {boolean}
      */
     accept: function(record)
     {
         return !this._regex || this._uiUtils.testContentMatching(record, this._regex);
     },
 
     __proto__: WebInspector.TimelineModel.Filter.prototype
 }