diff --git a/chrome/browser/extensions/tab_helper.h b/chrome/browser/extensions/tab_helper.h
index 6fbeba6..9dd5aee 100644
--- a/chrome/browser/extensions/tab_helper.h
+++ b/chrome/browser/extensions/tab_helper.h
@@ -75,11 +75,12 @@
   // specified id.
   void SetExtensionAppById(const ExtensionId& extension_app_id);
 
-  const Extension* extension_app() const { return extension_app_; }
-  bool is_app() const { return extension_app_ != NULL; }
-  const WebApplicationInfo& web_app_info() const {
-    return web_app_info_;
-  }
+  // Returns true if an app extension has been set.
+  bool is_app() const { return extension_app_ != nullptr; }
+
+  // Return ExtensionId for extension app.
+  // If an app extension has not been set, returns empty id.
+  ExtensionId GetAppId() const;
 
   // If an app extension has been explicitly set for this WebContents its icon
   // is returned.