DevTools: report timeline progress while recording.

Source/devtools/front_end/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 423 matching lines @@
 
     /**
      * @param {?MouseEvent} e
      */
     _onMouseWheel: function(e)
     {
         var windowLeft = this._timeWindowLeft ? this._timeWindowLeft : this._dataProvider.zeroTime();
         var windowRight = this._timeWindowRight !== Infinity ? this._timeWindowRight : this._dataProvider.zeroTime() + this._dataProvider.totalTime();
 
         if (e.wheelDeltaY) {
-            if (e.altKey) {
+            if (!e.altKey) {
                 const mouseWheelZoomSpeed = 1 / 120;
                 var zoom = Math.pow(1.2, -e.wheelDeltaY * mouseWheelZoomSpeed) - 1;
                 var cursorTime = this._cursorTime(e.offsetX);
                 windowLeft += (windowLeft - cursorTime) * zoom;
                 windowRight += (windowRight - cursorTime) * zoom;
             } else {
                 this._vScrollElement.scrollTop -= e.wheelDeltaY / 120 * this._offsetHeight / 8;
             }
         } else {
             var shift = e.wheelDeltaX * this._pixelToTime;
@@ skipping 350 matching lines @@
     reset: function()
     {
         this._highlightedEntryIndex = -1;
         this._selectedEntryIndex = -1;
         this._textWidth = {};
         this.update();
     },
 
     __proto__: WebInspector.HBox.prototype
 }