Timeline: decouple TimelineFrameModel from TimelineModel

Source/devtools/front_end/timeline/TimelineModel.js

 /*
  * Copyright (C) 2012 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 261 matching lines @@
 
     /**
      * @return {!Array.<!WebInspector.TimelineModel.Record>}
      */
     records: function()
     {
         return this._records;
     },
 
     /**
-     * @return {boolean}
-     */
-    bufferEvents: function()
-    {
-        return false;
-    },
-
-    /**
      * @param {!Blob} file
      * @param {!WebInspector.Progress} progress
      */
     loadFromFile: function(file, progress)
     {
         throw new Error("Not implemented");
     },
 
     /**
      * @param {string} url
@@ skipping 458 matching lines @@
         function recordTimestampComparator(a, b)
         {
             // Never return 0, as the merge function will squash identical entries.
             return a.startTime() < b.startTime() ? -1 : 1;
         }
         var result = this._backgroundRecordsBuffer.mergeOrdered(records, recordTimestampComparator);
         this._backgroundRecordsBuffer = [];
         return result;
     }
 }