[Android] Upstream remaining changes to NTP UI code.

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

Index: chrome/browser/ui/webui/ntp/recently_closed_tabs_handler.h
diff --git a/chrome/browser/ui/webui/ntp/recently_closed_tabs_handler.h b/chrome/browser/ui/webui/ntp/recently_closed_tabs_handler.h
index 65ee309fc6d273295ee1080e0fdc8562c6b01038..f5894e21af34b3b490d896469762c61687dcab4e 100644
--- a/chrome/browser/ui/webui/ntp/recently_closed_tabs_handler.h
+++ b/chrome/browser/ui/webui/ntp/recently_closed_tabs_handler.h
@@ -29,6 +29,9 @@ class RecentlyClosedTabsHandler : public content::WebUIMessageHandler,
   // Callback for the "getRecentlyClosedTabs" message.
   void HandleGetRecentlyClosedTabs(const ListValue* args);
 
+  // Callback for the "clearRecentlyClosed" message.
+  void HandleClearRecentlyClosed(const ListValue* args);
+
   // Observer callback for TabRestoreServiceObserver. Sends data on
   // recently closed tabs to the javascript side of this page to
   // display to the user.