DevTools: Allow disabling timeline live update as an experiment.

Source/devtools/front_end/Settings.js

 /*
  * Copyright (C) 2009 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 77 matching lines @@
     this.deviceOrientationOverride = this.createSetting("deviceOrientationOverride", "");
     this.showAdvancedHeapSnapshotProperties = this.createSetting("showAdvancedHeapSnapshotProperties", false);
     this.highResolutionCpuProfiling = this.createSetting("highResolutionCpuProfiling", false);
     this.searchInContentScripts = this.createSetting("searchInContentScripts", false);
     this.textEditorIndent = this.createSetting("textEditorIndent", "    ");
     this.textEditorAutoDetectIndent = this.createSetting("textEditorAutoIndentIndent", true);
     this.textEditorAutocompletion = this.createSetting("textEditorAutocompletion", true);
     this.textEditorBracketMatching = this.createSetting("textEditorBracketMatching", true);
     this.cssReloadEnabled = this.createSetting("cssReloadEnabled", false);
     this.timelineCaptureStacks = this.createSetting("timelineCaptureStacks", true);
+    this.timelineLiveUpdate = this.createSetting("timelineLiveUpdate", true);
     this.showMetricsRulers = this.createSetting("showMetricsRulers", false);
     this.overrideCSSMedia = this.createSetting("overrideCSSMedia", false);
     this.emulatedCSSMedia = this.createSetting("emulatedCSSMedia", "print");
     this.workerInspectorWidth = this.createSetting("workerInspectorWidth", 600);
     this.workerInspectorHeight = this.createSetting("workerInspectorHeight", 600);
     this.messageURLFilters = this.createSetting("messageURLFilters", {});
     this.networkHideDataURL = this.createSetting("networkHideDataURL", false);
     this.messageLevelFilters = this.createSetting("messageLevelFilters", {});
     this.splitVerticallyWhenDockedToRight = this.createSetting("splitVerticallyWhenDockedToRight", true);
     this.visiblePanels = this.createSetting("visiblePanels", {});
@@ skipping 177 matching lines @@
     this.stepIntoSelection = this._createExperiment("stepIntoSelection", "Show step-in candidates while debugging.");
     this.doNotOpenDrawerOnEsc = this._createExperiment("doNotOpenDrawerWithEsc", "Do not open drawer on Esc");
     this.showEditorInDrawer = this._createExperiment("showEditorInDrawer", "Show editor in drawer");
     this.gpuTimeline = this._createExperiment("gpuTimeline", "Show GPU data on timeline");
     this.applyCustomStylesheet = this._createExperiment("applyCustomStylesheet", "Allow custom UI themes");
     this.workersInMainWindow = this._createExperiment("workersInMainWindow", "Show workers in main window");
     this.dockToLeft = this._createExperiment("dockToLeft", "Enable dock to left mode");
     this.allocationProfiler = this._createExperiment("allocationProfiler", "Enable JavaScript heap allocation profiler");
     this.timelineFlameChart = this._createExperiment("timelineFlameChart", "Enable FlameChart mode in Timeline");
     this.heapSnapshotStatistics = this._createExperiment("heapSnapshotStatistics", "Show memory breakdown statistics in heap snapshots");
+    this.timelineNoLiveUpdate = this._createExperiment("timelineNoLiveUpdate", "Timeline w/o live update");
 
     this._cleanUpSetting();
 }
 
 WebInspector.ExperimentsSettings.prototype = {
     /**
      * @return {!Array.<!WebInspector.Experiment>}
      */
     get experiments()
     {
@@ skipping 298 matching lines @@
     {
         // If there are too many breakpoints in a storage, it is likely due to a recent bug that caused
         // periodical breakpoints duplication leading to inspector slowness.
         if (breakpointsSetting.get().length > maxBreakpointsCount)
             breakpointsSetting.set([]);
     }
 }
 
 WebInspector.settings = new WebInspector.Settings();
 WebInspector.experimentsSettings = new WebInspector.ExperimentsSettings(WebInspector.queryParam("experiments") !== null);