DevTools: Simplify firstFrameAfterCommit.

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 1029 matching lines @@
             WebInspector.TimelineUIUtils.buildTraceEventDetails(event, this._model, this._detailsLinkifier, this._appendDetailsTabsForTraceEventAndShowDetails.bind(this, event));
             break;
         case WebInspector.TimelineSelection.Type.TraceEvent:
             var event = /** @type {!WebInspector.TracingModel.Event} */ (this._selection.object());
             WebInspector.TimelineUIUtils.buildTraceEventDetails(event, this._model, this._detailsLinkifier, this._appendDetailsTabsForTraceEventAndShowDetails.bind(this, event));
             break;
         case WebInspector.TimelineSelection.Type.Frame:
             var frame = /** @type {!WebInspector.TimelineFrame} */ (this._selection.object());
             if (Runtime.experiments.isEnabled("filmStripInNetworkAndTimeline") && !this._filmStripModel)
                 this._filmStripModel = new WebInspector.FilmStripModel(this._tracingModel);
-            var filmStripFrame = this._filmStripModel && this._filmStripModel.firstFrameAfterCommit(frame.endTime);
+            var filmStripFrame = this._filmStripModel && this._filmStripModel.frameByTimestamp(frame.endTime);
+            if (filmStripFrame && filmStripFrame.timestamp - frame.endTime > 10)
+                filmStripFrame = null;
             this.showInDetails(WebInspector.TimelineUIUtils.generateDetailsContentForFrame(this._lazyFrameModel, frame, filmStripFrame));
             if (frame.layerTree) {
                 var layersView = this._layersView();
                 layersView.showLayerTree(frame.layerTree, frame.paints);
                 if (!this._detailsView.hasTab(WebInspector.TimelinePanel.DetailsTab.LayerViewer))
                     this._detailsView.appendTab(WebInspector.TimelinePanel.DetailsTab.LayerViewer, WebInspector.UIString("Layers"), layersView);
             }
             break;
         case WebInspector.TimelineSelection.Type.Range:
             this._updateSelectedRangeStats(this._selection._startTime, this._selection._endTime);
@@ skipping 775 matching lines @@
     /**
      * @override
      */
     reset: function()
     {
         this._filmStripView.reset();
     },
 
     __proto__: WebInspector.TimelineOverviewBase.prototype
 }