ntp4: record app launch source

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

Index: chrome/browser/ui/webui/ntp/app_launcher_handler.h
diff --git a/chrome/browser/ui/webui/ntp/app_launcher_handler.h b/chrome/browser/ui/webui/ntp/app_launcher_handler.h
index 7d6305c53ae66fdee13ae3f84bb89bb214b12046..3c9ef478367039f18a741619f625042b4b736ff4 100644
--- a/chrome/browser/ui/webui/ntp/app_launcher_handler.h
+++ b/chrome/browser/ui/webui/ntp/app_launcher_handler.h
@@ -102,6 +102,11 @@ class AppLauncherHandler : public WebUIMessageHandler,
   // Callback for the "generateAppForLink" message.
   void HandleGenerateAppForLink(const base::ListValue* args);
 
+  // Callback for the "recordAppLaunchByURL" message. Takes an escaped URL and a
+  // launch source (integer), and if the URL represents an app, records the
+  // action for UMA.
+  void HandleRecordAppLaunchByURL(const base::ListValue* args);
+
   // Register app launcher preferences.
   static void RegisterUserPrefs(PrefService* pref_service);