Add controlled setting indicator for proxy configuration

chrome/browser/resources/options/controlled_setting.js

Index: chrome/browser/resources/options/controlled_setting.js
diff --git a/chrome/browser/resources/options/controlled_setting.js b/chrome/browser/resources/options/controlled_setting.js
index 0d4e76086707fbda54bec31a2cbd6c46ac84f984..40f702ac971b57ab253309f9e0843a358ff92777 100644
--- a/chrome/browser/resources/options/controlled_setting.js
+++ b/chrome/browser/resources/options/controlled_setting.js
@@ -138,13 +138,21 @@ cr.define('options', function() {
         var self = this;
 
         // Construct the bubble text.
-        defaultStrings = {
-          'policy': loadTimeData.getString('controlledSettingPolicy'),
-          'extension': loadTimeData.getString('controlledSettingExtension'),
-          'recommended': loadTimeData.getString('controlledSettingRecommended'),
-          'hasRecommendation':
-              loadTimeData.getString('controlledSettingHasRecommendation'),
-        };
+        if (this.hasAttribute('plural')) {
+          var defaultStrings = {
+            'policy': loadTimeData.getString('controlledSettingsPolicy'),
+            'extension': loadTimeData.getString('controlledSettingsExtension'),
+          };
+        } else {
+          var defaultStrings = {
+            'policy': loadTimeData.getString('controlledSettingPolicy'),
+            'extension': loadTimeData.getString('controlledSettingExtension'),
+            'recommended':
+                loadTimeData.getString('controlledSettingRecommended'),
+            'hasRecommendation':
+                loadTimeData.getString('controlledSettingHasRecommendation'),
+          };
+        }
 
         // No controller, no bubble.
         if (!this.controlledBy || !(this.controlledBy in defaultStrings))