Index: ios/chrome/browser/web/tab_id_tab_helper.h |
diff --git a/ios/chrome/browser/web/tab_id_tab_helper.h b/ios/chrome/browser/web/tab_id_tab_helper.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..f70e85027302d203fd382478b39f1042d408c181 |
--- /dev/null |
+++ b/ios/chrome/browser/web/tab_id_tab_helper.h |
@@ -0,0 +1,27 @@ |
+// Copyright 2017 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef IOS_CHROME_BROWSER_WEB_TAB_ID_TAB_HELPER_H_ |
+#define IOS_CHROME_BROWSER_WEB_TAB_ID_TAB_HELPER_H_ |
+ |
+#include "base/macros.h" |
+#import "ios/web/public/web_state/web_state_user_data.h" |
+ |
+// Handles creating a unique identifier, which is stable across cold starts. |
+class TabIdTabHelper : public web::WebStateUserData<TabIdTabHelper> { |
+ public: |
+ ~TabIdTabHelper() override; |
+ |
+ // Returns a unique identifier for this tab. |
+ NSString* tab_id() const { return tab_id_; } |
+ |
+ private: |
+ friend class web::WebStateUserData<TabIdTabHelper>; |
+ explicit TabIdTabHelper(web::WebState* web_state); |
+ __strong NSString* tab_id_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(TabIdTabHelper); |
+}; |
+ |
+#endif // IOS_CHROME_BROWSER_WEB_TAB_ID_TAB_HELPER_H_ |