Create "Paint profiler" 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 386 matching lines @@
                                                                       this._captureMemorySetting,
                                                                       WebInspector.UIString("Capture memory information on every timeline event")));
         this._captureMemorySetting.addChangeListener(this._onModeChanged, this);
         if (WebInspector.experimentsSettings.timelinePowerProfiler.isEnabled()) {
             this._capturePowerSetting = WebInspector.settings.createSetting("timelineCapturePower", false);
             panelStatusBarElement.appendChild(this._createSettingCheckbox(WebInspector.UIString("Power"),
                                                                           this._capturePowerSetting,
                                                                           WebInspector.UIString("Capture power information")));
             this._capturePowerSetting.addChangeListener(this._onModeChanged, this);
         }
-        if (WebInspector.experimentsSettings.timelineOnTraceEvents.isEnabled()) {
+        if (WebInspector.experimentsSettings.timelineOnTraceEvents.isEnabled() &&
+            WebInspector.experimentsSettings.paintProfiler.isEnabled()) {

[pfeldman, 2014/08/08 12:32:21]

You want to hide layers behind experiment as well.

[yurys, 2014/08/08 12:58:06]

Added checks in a couple of places but neither layer tree nor pictures should be
recorded if "Paint" checkbox is not ticked.

             this._captureLayersAndPicturesSetting = WebInspector.settings.createSetting("timelineCaptureLayersAndPictures", false);
             panelStatusBarElement.appendChild(this._createSettingCheckbox(WebInspector.UIString("Paint"),
                                                                           this._captureLayersAndPicturesSetting,
                                                                           WebInspector.UIString("Capture graphics layer positions and painted pictures")));
         }
 
         this._miscStatusBarItems = panelStatusBarElement.createChild("div", "status-bar-item");
 
         this._filtersContainer = this.element.createChild("div", "timeline-filters-header hidden");
         this._filtersContainer.appendChild(this._filterBar.filtersElement());
@@ skipping 1025 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
 }