Add recommended extension installation support

chrome/browser/resources/extensions/extension_list.js

Index: chrome/browser/resources/extensions/extension_list.js
diff --git a/chrome/browser/resources/extensions/extension_list.js b/chrome/browser/resources/extensions/extension_list.js
index bdaa3f96e4e69a601c04cefcea135ed3dc2035c8..758999923f37786b51bc3b4da04d7d40dd90e857 100644
--- a/chrome/browser/resources/extensions/extension_list.js
+++ b/chrome/browser/resources/extensions/extension_list.js
@@ -46,6 +46,7 @@
  *            packagedApp: boolean,
  *            path: (string|undefined),
  *            prettifiedPath: (string|undefined),
+ *            recommendedInstall: boolean,
  *            runtimeErrors: (Array.<RuntimeError>|undefined),
  *            suspiciousInstall: boolean,
  *            terminated: boolean,
@@ -170,6 +171,8 @@ cr.define('options', function() {
           extension.dependentExtensions.length > 0) {
         node.classList.add('may-not-modify');
         node.classList.add('may-not-remove');
+      } else if (extension.recommendedInstall) {
+        node.classList.add('may-not-remove');
       } else if (extension.suspiciousInstall || extension.corruptInstall) {
         node.classList.add('may-not-modify');
       }
@@ -395,7 +398,7 @@ cr.define('options', function() {
       }
 
       // Then the 'managed, cannot uninstall/disable' message.
-      if (extension.managedInstall) {
+      if (extension.managedInstall || extension.recommendedInstall) {
         node.querySelector('.managed-message').hidden = false;
       } else {
         if (extension.suspiciousInstall) {