DevTools: fix paint profiler in slimming paint mode

Source/devtools/front_end/timeline/TimelineModel.js

 /*
  * Copyright (C) 2012 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 128 matching lines @@
     TracingSessionIdForWorker: "TracingSessionIdForWorker",
 
     DecodeImage: "Decode Image",
     ResizeImage: "Resize Image",
     DrawLazyPixelRef: "Draw LazyPixelRef",
     DecodeLazyPixelRef: "Decode LazyPixelRef",
 
     LazyPixelRef: "LazyPixelRef",
     LayerTreeHostImplSnapshot: "cc::LayerTreeHostImpl",
     PictureSnapshot: "cc::Picture",
+    DisplayItemListSnapshot: "cc::DisplayItemList",
 
     // CpuProfile is a virtual event created on frontend to support
     // serialization of CPU Profiles within tracing timeline data.
     CpuProfile: "CpuProfile"
 }
 
 WebInspector.TimelineModel.Events = {
     RecordsCleared: "RecordsCleared",
     RecordingStarted: "RecordingStarted",
     RecordingStopped: "RecordingStopped",
@@ skipping 966 matching lines @@
             event.backendNodeId = event.args["data"]["nodeId"];
             var layerUpdateEvent = this._findAncestorEvent(recordTypes.UpdateLayer);
             if (!layerUpdateEvent || layerUpdateEvent.args["layerTreeId"] !== this._inspectedTargetLayerTreeId)
                 break;
             // Only keep layer paint events, skip paints for subframes that get painted to the same layer as parent.
             if (!event.args["data"]["layerId"])
                 break;
             this._lastPaintForLayer[layerUpdateEvent.args["layerId"]] = event;
             break;
 
+        case recordTypes.DisplayItemListSnapshot:
         case recordTypes.PictureSnapshot:
             var layerUpdateEvent = this._findAncestorEvent(recordTypes.UpdateLayer);
             if (!layerUpdateEvent || layerUpdateEvent.args["layerTreeId"] !== this._inspectedTargetLayerTreeId)
                 break;
             var paintEvent = this._lastPaintForLayer[layerUpdateEvent.args["layerId"]];
             if (paintEvent)
                 paintEvent.picture = event;
             break;
 
         case recordTypes.ScrollLayer:
@@ skipping 930 matching lines @@
         /** @type {!Object.<string, !Array.<!WebInspector.InvalidationTrackingEvent>>} */
         this._invalidations = {};
         /** @type {!Object.<number, !Array.<!WebInspector.InvalidationTrackingEvent>>} */
         this._invalidationsByNodeId = {};
 
         this._lastRecalcStyle = undefined;
         this._lastPaintWithLayer = undefined;
         this._didPaint = false;
     }
 }