MD Settings: clarify "controlled by" logic

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

Index: chrome/test/data/webui/settings/controlled_button_tests.js
diff --git a/chrome/test/data/webui/settings/controlled_button_tests.js b/chrome/test/data/webui/settings/controlled_button_tests.js
index edde16b883be0969fbe8f62c81c10ff4a10e0d68..7b37046f9779d0a44bb81a51570543d169baa393 100644
--- a/chrome/test/data/webui/settings/controlled_button_tests.js
+++ b/chrome/test/data/webui/settings/controlled_button_tests.js
@@ -21,8 +21,7 @@ suite('controlled button', function() {
   });
 
   test('disables when pref is managed', function() {
-    button.set('pref.policyEnforcement',
-               chrome.settingsPrivate.PolicyEnforcement.ENFORCED);
+    button.set('pref.enforcement', chrome.settingsPrivate.Enforcement.ENFORCED);
     Polymer.dom.flush();
     assertTrue(button.$$('paper-button').disabled);
 
@@ -30,7 +29,7 @@ suite('controlled button', function() {
     assertTrue(!!indicator);
     assertGT(indicator.clientHeight, 0);
 
-    button.set('pref.policyEnforcement', undefined);
+    button.set('pref.enforcement', undefined);
     Polymer.dom.flush();
     assertFalse(button.$$('paper-button').disabled);
     assertEquals(0, indicator.clientHeight);