MD Settings: Rename and fix confusing prefs test function

chrome/test/data/webui/settings/prefs_tests.js

Index: chrome/test/data/webui/settings/prefs_tests.js
diff --git a/chrome/test/data/webui/settings/prefs_tests.js b/chrome/test/data/webui/settings/prefs_tests.js
index b20f6573d0940aaad5b7d5b364ab5a4db59b6821..42aa4d80806a4825bc058dde01da41b9336e42fb 100644
--- a/chrome/test/data/webui/settings/prefs_tests.js
+++ b/chrome/test/data/webui/settings/prefs_tests.js
@@ -109,7 +109,7 @@ cr.define('settings_prefs', function() {
         // Reset each <settings-prefs>. TODO(michaelpg): make settings-prefs
         // less dependent on testing state so we don't have to do this.
         for (var i = 0; i < createdElements.length; i++)
-          createdElements[i].resetForTesting();
+          createdElements[i].uninitializeForTesting();
 
         PolymerTest.clearBody();
       });