Support submillisecond times on FlameChart

Source/devtools/front_end/CPUProfileView.js

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 557 matching lines @@
         function totalHitCount(node) {
             var result = node.hitCount;
             for (var i = 0; i < node.children.length; i++)
                 result += totalHitCount(node.children[i]);
             return result;
         }
         profile.totalHitCount = totalHitCount(profile.head);
 
         var durationMs = 1000 * profile.endTime - 1000 * profile.startTime;
         var samplingRate = profile.totalHitCount / durationMs;
+        this.samplesPerMs = samplingRate;
 
         function calculateTimesForNode(node) {
             node.selfTime = node.hitCount * samplingRate;
             var totalTime = node.selfTime;
             for (var i = 0; i < node.children.length; i++)
                 totalTime += calculateTimesForNode(node.children[i]);
             node.totalTime = totalTime;
             return totalTime;
         }
         calculateTimesForNode(profile.head);
@@ skipping 337 matching lines @@
         this.title = file.name;
         this.sidebarElement.subtitle = WebInspector.UIString("Loading\u2026");
         this.sidebarElement.wait = true;
 
         var fileReader = new WebInspector.ChunkedFileReader(file, 10000000, this);
         fileReader.start(this);
     },
 
     __proto__: WebInspector.ProfileHeader.prototype
 }