DevTools: Async stacks out of experiments.

Source/devtools/front_end/DebuggerModel.js

 /*
  * Copyright (C) 2010 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 163 matching lines @@
             state = WebInspector.DebuggerModel.PauseOnExceptionsState.PauseOnAllExceptions;
         } else {
             state = WebInspector.DebuggerModel.PauseOnExceptionsState.PauseOnUncaughtExceptions;
         }
         this._agent.setPauseOnExceptions(state);
     },
 
     _asyncStackTracesStateChanged: function()
     {
         const maxAsyncStackChainDepth = 4;
-        var enabled = WebInspector.settings.enableAsyncStackTraces.get() && WebInspector.experimentsSettings.asyncStackTraces.isEnabled();
+        var enabled = WebInspector.settings.enableAsyncStackTraces.get();
         this._agent.setAsyncCallStackDepth(enabled ? maxAsyncStackChainDepth : 0);
     },
 
     _debuggerWasDisabled: function()
     {
         this._debuggerEnabled = false;
         this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.DebuggerWasDisabled);
     },
 
     /**
@@ skipping 832 matching lines @@
             this.callFrames[i].dispose();
         if (this.asyncStackTrace)
             this.asyncStackTrace.dispose();
     }
 }
 
 /**
  * @type {!WebInspector.DebuggerModel}
  */
 WebInspector.debuggerModel;