Show modal dialog to tell users that the profile is managed when it's the case.

chrome/browser/resources/apps_debugger/js/items.js

Index: chrome/browser/resources/apps_debugger/js/items.js
diff --git a/chrome/browser/resources/apps_debugger/js/items.js b/chrome/browser/resources/apps_debugger/js/items.js
index 8d0946429d5362b7a5ead31020231a827cec5d06..5ff959eaed03d15152227f16aeeb1d0d5a8132b0 100644
--- a/chrome/browser/resources/apps_debugger/js/items.js
+++ b/chrome/browser/resources/apps_debugger/js/items.js
@@ -96,6 +96,23 @@ cr.define('apps_dev_tool', function() {
     chrome.developerPrivate.getStrings(function(strings) {
       loadTimeData.data = strings;
       i18nTemplate.process(document, loadTimeData);
+
+      // Check managed profiles.
+      chrome.developerPrivate.isProfileManaged(function(isManaged) {
+        if (!isManaged)
+          return;
+        alertOverlay.setValues(
+            loadTimeData.getString('managedProfileDialogTitle'),
+            loadTimeData.getString('managedProfileDialogDescription'),
+            loadTimeData.getString('managedProfileDialogCloseButton'),
+            null,
+            function() {
+              AppsDevTool.showOverlay(null);
+              window.close();
+            },
+            null);
+        AppsDevTool.showOverlay($('alertOverlay'));
+      });
     });
   };