DevTools: forward Up/Down keys to profiles sidebar from FlameChart

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 86 matching lines @@
     this._barHeight = dataProvider.barHeight();
     this._barHeightDelta = this._isTopDown ? -this._barHeight : this._barHeight;
     this._paddingLeft = this._dataProvider.paddingLeft();
     this._markerPadding = 2;
     this._markerRadius = this._barHeight / 2 - this._markerPadding;
     this._highlightedMarkerIndex = -1;
     this._highlightedEntryIndex = -1;
     this._selectedEntryIndex = -1;
     this._rawTimelineDataLength = 0;
     this._textWidth = {};
+
+    this._lastMouseOffsetX = 0;
 }
 
 WebInspector.FlameChart.DividersBarHeight = 18;
 
 WebInspector.FlameChart.MinimalTimeWindowMs = 0.01;
 
 /**
  * @interface
  */
 WebInspector.FlameChartDataProvider = function()
@@ skipping 1415 matching lines @@
         this.update();
     },
 
     _enabled: function()
     {
         return this._rawTimelineDataLength !== 0;
     },
 
     __proto__: WebInspector.HBox.prototype
 }