Make a separate histogram for MatchComplete Final Status'es and

chrome/browser/prerender/prerender_contents.h

Index: chrome/browser/prerender/prerender_contents.h
===================================================================
--- chrome/browser/prerender/prerender_contents.h	(revision 118385)
+++ chrome/browser/prerender/prerender_contents.h	(working copy)
@@ -81,6 +81,12 @@
   };
   typedef std::list<PendingPrerenderData> PendingPrerenderList;
 
+  enum MatchCompleteStatus {
+    MC_DEFAULT,
+    MC_REPLACED,
+    MC_REPLACEMENT
+  };
+
   virtual ~PrerenderContents();
 
   bool Init();
@@ -106,6 +112,8 @@
   const content::Referrer& referrer() const { return referrer_; }
   bool has_stopped_loading() const { return has_stopped_loading_; }
   bool prerendering_has_started() const { return prerendering_has_started_; }
+  MatchCompleteStatus mc_status() const { return mc_status_; }
+  void set_mc_status(MatchCompleteStatus status) { mc_status_ = status; }
 
   // Sets the parameter to the value of the associated RenderViewHost's child id
   // and returns a boolean indicating the validity of that id.
@@ -269,6 +277,8 @@
 
   bool prerendering_has_started_;
 
+  MatchCompleteStatus mc_status_;
+
   // Tracks whether or not prerendering has been cancelled by calling Destroy.
   // Used solely to prevent double deletion.
   bool prerendering_has_been_cancelled_;