MD Settings: Fix broken numeric prefs using boolean controls

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

Index: chrome/test/data/webui/settings/settings_toggle_button_tests.js
diff --git a/chrome/test/data/webui/settings/settings_toggle_button_tests.js b/chrome/test/data/webui/settings/settings_toggle_button_tests.js
index 78770d71afa4de3eca01a9d835ee7d5d29acfc88..8dbf002e3cc5f8d6767c2ddd80fbc38ea488f09d 100644
--- a/chrome/test/data/webui/settings/settings_toggle_button_tests.js
+++ b/chrome/test/data/webui/settings/settings_toggle_button_tests.js
@@ -110,7 +110,7 @@ cr.define('settings_toggle_button', function() {
           value: 5
         };
 
-        testElement._setNumericUncheckedValue(5);
+        testElement.numericUncheckedValue = 5;
 
         testElement.set('pref', prefNum);
         assertFalse(testElement.checked);
@@ -131,7 +131,7 @@ cr.define('settings_toggle_button', function() {
           value: 3
         };
 
-        testElement._setNumericUncheckedValue(5);
+        testElement.numericUncheckedValue = 5;
 
         testElement.set('pref', prefNum);