Make a separate histogram for MatchComplete Final Status'es and

chrome/browser/prerender/prerender_histograms.h

Index: chrome/browser/prerender/prerender_histograms.h
===================================================================
--- chrome/browser/prerender/prerender_histograms.h	(revision 118385)
+++ chrome/browser/prerender/prerender_histograms.h	(working copy)
@@ -51,7 +51,12 @@
                          uint8 experiment_id,
                          FinalStatus final_status) const;
 
+  // Record a MatchComplete final status of a prerendered page in a histogram.
+  void RecordMatchCompleteFinalStatus(Origin origin,
+                                      uint8 experiment_id,
+                                      FinalStatus final_status) const;
 
+
   // To be called when a new prerender is added.
   void RecordPrerender(Origin origin, const GURL& url);