Cleanup: Change LogMostVisitedImpression|Navigation APIs to take an enum

chrome/browser/ui/search/search_tab_helper.h

 // Copyright 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_SEARCH_SEARCH_TAB_HELPER_H_
 #define CHROME_BROWSER_UI_SEARCH_SEARCH_TAB_HELPER_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 147 matching lines @@
       const content::LoadCommittedDetails& load_details) override;
 
   // Overridden from SearchIPCRouter::Delegate:
   void OnInstantSupportDetermined(bool supports_instant) override;
   void FocusOmnibox(OmniboxFocusState state) override;
   void OnDeleteMostVisitedItem(const GURL& url) override;
   void OnUndoMostVisitedDeletion(const GURL& url) override;
   void OnUndoAllMostVisitedDeletions() override;
   void OnLogEvent(NTPLoggingEventType event, base::TimeDelta time) override;
   void OnLogMostVisitedImpression(int position,
-                                  const base::string16& provider) override;
+                                  NTPLoggingTileSource tile_source) override;
   void OnLogMostVisitedNavigation(int position,
-                                  const base::string16& provider) override;
+                                  NTPLoggingTileSource tile_source) override;
   void PasteIntoOmnibox(const base::string16& text) override;
   void OnChromeIdentityCheck(const base::string16& identity) override;
   void OnHistorySyncCheck() override;
 
   // Overridden from InstantServiceObserver:
   void ThemeInfoChanged(const ThemeBackgroundInfo& theme_info) override;
   void MostVisitedItemsChanged(
       const std::vector<InstantMostVisitedItem>& items) override;
 
   // Sets the mode of the model based on the current URL of web_contents().
@@ skipping 47 matching lines @@
   SearchTabHelperDelegate* delegate_;
 
   // Function to check if the omnibox has focus. Tests use this to modify the
   // default behavior.
   OmniboxHasFocusFn omnibox_has_focus_fn_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchTabHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_SEARCH_TAB_HELPER_H_