[DevTools] Add uiTest.testSettings.

Source/devtools/front_end/Runtime.js

 /*
  * Copyright (C) 2014 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 973 matching lines @@
 
     /**
      * @param {string} experimentName
      */
     enableForTest: function(experimentName)
     {
         this._checkExperiment(experimentName);
         this._enabledTransiently[experimentName] = true;
     },
 
+    clearForTest: function()
+    {
+        this._experiments = [];
+        this._experimentNames = {};
+        this._enabledTransiently = {};
+    },
+
     cleanUpStaleExperiments: function()
     {
         var experimentsSetting = Runtime._experimentsSetting();
         var cleanedUpExperimentSetting = {};
         for (var i = 0; i < this._experiments.length; ++i) {
             var experimentName = this._experiments[i].name;
             if (experimentsSetting[experimentName])
                 cleanedUpExperimentSetting[experimentName] = true;
         }
         this._setExperimentsSetting(cleanedUpExperimentSetting);
@@ skipping 59 matching lines @@
 Runtime.experiments = new Runtime.ExperimentsSupport();
 Runtime.experiments.register("remoteModules", "Remote Modules", true);
 
 /**
  * @type {?string}
  */
 Runtime._remoteBase = Runtime.queryParam("remoteBase");
 
 /** @type {!Runtime} */
 var runtime;