DevTools: remove ruler bar from the main flamechart

third_party/WebKit/Source/devtools/front_end/profiler/CPUProfileFlameChart.js

 /**
  * Copyright (C) 2014 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 506 matching lines @@
       return;
     this._updateTimerId = this.element.window().requestAnimationFrame(this.update.bind(this));
   }
 
   update() {
     this._updateTimerId = 0;
     var timelineData = this._timelineData();
     if (!timelineData)
       return;
     this._resetCanvas(
-        this._overviewContainer.clientWidth, this._overviewContainer.clientHeight - UI.FlameChart.DividersBarHeight);
+        this._overviewContainer.clientWidth, this._overviewContainer.clientHeight - UI.FlameChart.HeaderHeight);
     this._overviewCalculator._updateBoundaries(this);
     this._overviewGrid.updateDividers(this._overviewCalculator);
     this._drawOverviewCanvas();
   }
 
   _drawOverviewCanvas() {
     var canvasWidth = this._overviewCanvas.width;
     var canvasHeight = this._overviewCanvas.height;
     var drawData = this._calculateDrawData(canvasWidth);
     var context = this._overviewCanvas.getContext('2d');
@@ skipping 50 matching lines @@
    * @param {number} height
    */
   _resetCanvas(width, height) {
     var ratio = window.devicePixelRatio;
     this._overviewCanvas.width = width * ratio;
     this._overviewCanvas.height = height * ratio;
     this._overviewCanvas.style.width = width + 'px';
     this._overviewCanvas.style.height = height + 'px';
   }
 };