Add API in developerPrivate to allow/ disallow incognito mode.

chrome/browser/resources/apps_debugger/js/items_list.js

Index: chrome/browser/resources/apps_debugger/js/items_list.js
diff --git a/chrome/browser/resources/apps_debugger/js/items_list.js b/chrome/browser/resources/apps_debugger/js/items_list.js
index 4baefa1e043e2db69a6f61e202eea1f9868b4532..0dcc613367d0f40c54347ec2570962ba38c6a001 100644
--- a/chrome/browser/resources/apps_debugger/js/items_list.js
+++ b/chrome/browser/resources/apps_debugger/js/items_list.js
@@ -146,6 +146,9 @@ cr.define('apps_dev_tool', function() {
       var description = node.querySelector('.extension-description span');
       description.textContent = item.description;
 
+      // The 'allow in incognito' checkbox.
+      this.setAllowIncognitoCheckbox_(item, node);
+
       // The 'allow file:// access' checkbox.
       if (item.wants_file_access)
         this.setAllowFileAccessCheckbox_(item, node);
@@ -315,6 +318,26 @@ cr.define('apps_dev_tool', function() {
     },
 
     /**
+     * Sets the handler for the allow_incognito checkbox.
+     * @param {!Object} item A dictionary of item metadata.
+     * @param {HTMLElement} el HTML element containing all items.
+     * @private
+     */
+    setAllowIncognitoCheckbox_: function(item, el) {
+      if (item.allow_incognito) {
+        var incognito = el.querySelector('.incognito-control');
+        incognito.addEventListener('change', function(e) {
+          chrome.developerPrivate.allowIncognito(
+              item.id, !!e.target.checked, function() {
+            ItemsList.loadItemsInfo();
+          });
+        });
+        incognito.querySelector('input').checked = item.incognito_enabled;
+        incognito.hidden = false;
+      }
+    },
+
+    /**
      * Sets the active views link of an item. Clicking on the link
      * opens devtools window to inspect.
      * @param {!Object} item A dictionary of item metadata.