Use UMA_HISTOGRAM_ENUMERATION instead of UMA_HISTOGRAM_BOOLEAN

chrome/browser/ui/webui/ntp/new_tab_page_handler.h

 // Copyright (c) 2012 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_NTP_NEW_TAB_PAGE_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_PAGE_HANDLER_H_
 
 #include "base/values.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "content/public/browser/web_ui_message_handler.h"
@@ skipping 21 matching lines @@
 
   // WebUIMessageHandler implementation.
   virtual void RegisterMessages() OVERRIDE;
 
   // Callback for "notificationPromoClosed". No arguments.
   void HandleNotificationPromoClosed(const ListValue* args);
 
   // Callback for "notificationPromoViewed". No arguments.
   void HandleNotificationPromoViewed(const ListValue* args);
 
+  // Callback for "notificationPromoLinkClicked". No arguments.
+  void HandleNotificationPromoLinkClicked(const ListValue* args);
+
   // Callback for "bubblePromoClosed". No arguments.
   void HandleBubblePromoClosed(const ListValue* args);
 
   // Callback for "bubblePromoViewed". No arguments.
   void HandleBubblePromoViewed(const ListValue* args);
 
   // Callback for "bubblePromoLinkClicked". No arguments.
   void HandleBubblePromoLinkClicked(const ListValue* args);
 
   // Callback for "pageSelected".
@@ skipping 25 matching lines @@
   static const int kHistogramEnumerationMax =
       (LAST_PAGE_ID >> kPageIdOffset) + 1;
 
   // Helper to send out promo resource change notification.
   void Notify(chrome::NotificationType notification_type);
 
   DISALLOW_COPY_AND_ASSIGN(NewTabPageHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_PAGE_HANDLER_H_