Policy: check MustRemainInstalled in addition to UserMayModifySettings before offering uninstall

chrome/browser/extensions/extension_context_menu_model.cc

Index: chrome/browser/extensions/extension_context_menu_model.cc
diff --git a/chrome/browser/extensions/extension_context_menu_model.cc b/chrome/browser/extensions/extension_context_menu_model.cc
index 6258a8613f222cd49749403f4027a409624c6992..a54ac2ceab3f0f04b9a406c2052edf6dc00df0bb 100644
--- a/chrome/browser/extensions/extension_context_menu_model.cc
+++ b/chrome/browser/extensions/extension_context_menu_model.cc
@@ -156,8 +156,10 @@ bool ExtensionContextMenuModel::IsCommandIdEnabled(int command_id) const {
         extension_action_->HasPopup(SessionTabHelper::IdForTab(web_contents));
   } else if (command_id == UNINSTALL) {
     // Some extension types can not be uninstalled.
-    return extensions::ExtensionSystem::Get(
-        profile_)->management_policy()->UserMayModifySettings(extension, NULL);
+    extensions::ManagementPolicy* policy =
+        extensions::ExtensionSystem::Get(profile_)->management_policy();
+    return policy->UserMayModifySettings(extension, nullptr) &&
+           !policy->MustRemainInstalled(extension, nullptr);
   }
   return true;
 }