Cleanup: Change LogMostVisitedImpression|Navigation APIs to take an enum

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

 // Copyright 2013 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_NTP_USER_DATA_LOGGER_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_NTP_USER_DATA_LOGGER_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 23 matching lines @@
   // Logs a number of statistics regarding the NTP. Called when an NTP tab is
   // about to be deactivated (be it by switching tabs, losing focus or closing
   // the tab/shutting down Chrome), or when the user navigates to a URL.
   void EmitNtpStatistics();
 
   // Called when an event occurs on the NTP that requires a counter to be
   // incremented. |time| is the delta time in ms from navigation start until
   // this event happened.
   void LogEvent(NTPLoggingEventType event, base::TimeDelta time);
 
-  // Logs an impression on one of the Most Visited tiles by a given provider.
-  void LogMostVisitedImpression(int position, const base::string16& provider);
+  // Logs an impression on one of the NTP tiles by a given source.
+  void LogMostVisitedImpression(int position, NTPLoggingTileSource tile_source);
 
-  // Logs a navigation on one of the Most Visited tiles by a given provider.
-  void LogMostVisitedNavigation(int position, const base::string16& provider);
+  // Logs a navigation on one of the NTP tiles by a given source.
+  void LogMostVisitedNavigation(int position, NTPLoggingTileSource tile_source);
 
   // content::WebContentsObserver override
   void NavigationEntryCommitted(
       const content::LoadCommittedDetails& load_details) override;
 
  protected:
   explicit NTPUserDataLogger(content::WebContents* contents);
 
  private:
   friend class content::WebContentsUserData<NTPUserDataLogger>;
@@ skipping 49 matching lines @@
   // Are stats being logged during Chrome startup?
   bool during_startup_;
 
   // The URL of this New Tab Page - varies based on NTP version.
   GURL ntp_url_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPUserDataLogger);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NTP_USER_DATA_LOGGER_H_