[MD Bookmarks] Add toasts.

chrome/browser/ui/webui/plural_string_handler.h

+// 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 CHROME_BROWSER_UI_WEBUI_PLURAL_STRING_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_PLURAL_STRING_HANDLER_H_
+
+#include "base/callback_forward.h"

[tsergeant, 2017/06/07 04:42:57]

Nit: Is this needed? There are no callbacks in this file.

[calamity, 2017/06/07 05:51:39]

Removed.

+#include "base/macros.h"
+#include "content/public/browser/web_ui_message_handler.h"
+
+// A handler which provides pluralized strings.
+class PluralStringHandler : public content::WebUIMessageHandler {
+ public:
+  PluralStringHandler();
+  ~PluralStringHandler() override;
+
+  void AddLocalizedString(const std::string& name, int id);
+
+  // WebUIMessageHandler:
+  void RegisterMessages() override;
+
+ private:
+  void HandleGetPluralString(const base::ListValue* args);
+
+  std::map<std::string, int> name_to_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(PluralStringHandler);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_PLURAL_STRING_HANDLER_H_