Log NTP hovers in 1993 clients

chrome/browser/ui/search/instant_page.h

Index: chrome/browser/ui/search/instant_page.h
diff --git a/chrome/browser/ui/search/instant_page.h b/chrome/browser/ui/search/instant_page.h
index eda5fa3d0a50716e7664053384e6a7acf07a96b4..d59e53e916c467566e8a880c7b54b655776ca65e 100644
--- a/chrome/browser/ui/search/instant_page.h
+++ b/chrome/browser/ui/search/instant_page.h
@@ -92,6 +92,9 @@ class InstantPage : public content::WebContentsObserver,
                                WindowOpenDisposition disposition,
                                bool is_search_type) = 0;
 
+    // Used to log in UMA the total number of mouseovers over NTP tiles/titles.
+    virtual void LogIframeHover() = 0;
+
     // Called when the SearchBox wants to delete a Most Visited item.
     virtual void DeleteMostVisitedItem(const GURL& url) = 0;
 
@@ -211,6 +214,7 @@ class InstantPage : public content::WebContentsObserver,
                            content::PageTransition transition,
                            WindowOpenDisposition disposition,
                            bool is_search_type);
+  void OnLogIframeHover(int page_id);
   void OnDeleteMostVisitedItem(int page_id, const GURL& url);
   void OnUndoMostVisitedDeletion(int page_id, const GURL& url);
   void OnUndoAllMostVisitedDeletions(int page_id);