DevTools: Introduce device dependent CPU throttling rates.

third_party/WebKit/Source/devtools/front_end/timeline/TimelinePanel.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 402 matching lines @@
              * @this {WebInspector.TimelinePanel}
              */
             function addGroupingOption(name, value)
             {
                 var option = this._cpuThrottlingCombobox.createOption(name, "", String(value));
                 this._cpuThrottlingCombobox.addOption(option);
                 if (value === this._cpuThrottlingManager.rate())
                     this._cpuThrottlingCombobox.select(option);
             }
             addGroupingOption.call(this, WebInspector.UIString("No CPU throttling"), 1);
-            for (var rate of [1.2, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 20, 30, 50])
-                addGroupingOption.call(this, WebInspector.UIString("%fx slowdown", rate), rate);
+            addGroupingOption.call(this, WebInspector.UIString("High end device\u2003(2x slowdown)"), 2);
+            addGroupingOption.call(this, WebInspector.UIString("Low end device\u2003(5x slowdown)"), 5);
             this._panelToolbar.appendToolbarItem(this._cpuThrottlingCombobox);
         }
     },
 
     _prepareToLoadTimeline: function()
     {
          console.assert(this._state === WebInspector.TimelinePanel.State.Idle);
          this._setState(WebInspector.TimelinePanel.State.Loading);
     },
 
@@ skipping 1629 matching lines @@
      * @override
      * @param {!WebInspector.Target} target
      */
     targetRemoved: function(target)
     {
         this._targets.remove(target, true);
     },
 
     __proto__: WebInspector.Object.prototype
 }