DevTools: followup fix for r179113. It provides an empty base implementation of setMergeRecords.

Source/devtools/front_end/timeline/TimelineFrameModel.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 20 matching lines @@
 /**
  * @constructor
  */
 WebInspector.TimelineFrameModelBase = function()
 {
     this.reset();
 }
 
 WebInspector.TimelineFrameModelBase.prototype = {
     /**
+     * @param {boolean} value
+     */
+    setMergeRecords: function(value)
+    {
+    },
+
+    /**
      * @return {!Array.<!WebInspector.TimelineFrame>}
      */
     frames: function()
     {
         return this._frames;
     },
 
     /**
      * @param {number} startTime
      * @param {number} endTime
@@ skipping 535 matching lines @@
 /**
  * @constructor
  */
 WebInspector.PendingFrame = function()
 {
     /** @type {!Object.<string, number>} */
     this.timeByCategory = {};
     /** @type {!Array.<!WebInspector.LayerPaintEvent>} */
     this.paints = [];
 }