DevTools: Add TimelinePowerGraph

Source/devtools/front_end/MemoryCountersGraph.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 54 matching lines @@
             for (var name in counters) {
                 var counter = this._countersByName[name];
                 if (counter)
                     counter.appendSample(record.endTime || record.startTime, counters[name]);
             }
         }
         WebInspector.TimelineModel.forAllRecords([record], null, addStatistics.bind(this));
         this.scheduleRefresh();
     },
 
+    refreshRecords: function()
+    {
+        this.reset();
+        var records = this._model.records();
+        for (var i = 0; i < records.length; ++i)
+            this.addRecord(records[i]);
+    },
+
     __proto__: WebInspector.CountersGraph.prototype
 }