[Devtools] Fixed dividers in new network canvas timeline

third_party/WebKit/Source/devtools/front_end/ui_lazy/FlameChart.js

 /**
  * Copyright (C) 2013 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 1024 matching lines @@
             if (!text || !text.length)
                 continue;
             context.fillStyle = this._dataProvider.textColor(entryIndex);
             context.fillText(text, barX + textPadding, barY + textBaseHeight);
         }
 
         this._drawFlowEvents(context, width, height);
 
         context.restore();
 
-        WebInspector.TimelineGrid.drawCanvasGrid(this._canvas, this._calculator);
+        WebInspector.TimelineGrid.drawCanvasGrid(context, this._calculator, 3);
         this._drawMarkers();
         this._drawGroupHeaders(width, height);
 
         this._updateElementPosition(this._highlightElement, this._highlightedEntryIndex);
         this._updateElementPosition(this._selectedElement, this._selectedEntryIndex);
         this._updateMarkerHighlight();
     },
 
     /**
      * @param {number} width
@@ skipping 600 matching lines @@
         this.update();
     },
 
     _enabled: function()
     {
         return this._rawTimelineDataLength !== 0;
     },
 
     __proto__: WebInspector.ChartViewport.prototype
 };