MD Settings: Rename and fix confusing prefs test function

chrome/browser/resources/settings/prefs/prefs.js

Index: chrome/browser/resources/settings/prefs/prefs.js
diff --git a/chrome/browser/resources/settings/prefs/prefs.js b/chrome/browser/resources/settings/prefs/prefs.js
index e466e58391bf046186bd5b726bc9ace43665d59b..c17dbcb5462f46e8eafcaa6f0115c9242d80bca0 100644
--- a/chrome/browser/resources/settings/prefs/prefs.js
+++ b/chrome/browser/resources/settings/prefs/prefs.js
@@ -238,11 +238,12 @@
     },
 
     /**
-     * Uninitializes this element to remove it from tests. Also resets
+     * Uninitializes this element to render it inert in tests. Also resets
      * settings-prefs-singleton, allowing newly created elements to
      * re-initialize it.
      */
-    resetForTesting: function() {
+    uninitializeForTesting: function() {
+      this.stopListening_();
       this.singleton_.resetForTesting();
     },
   });