Make a separate histogram for MatchComplete Final Status'es and

chrome/browser/prerender/prerender_histograms.cc

Index: chrome/browser/prerender/prerender_histograms.cc
===================================================================
--- chrome/browser/prerender/prerender_histograms.cc	(revision 118385)
+++ chrome/browser/prerender/prerender_histograms.cc	(working copy)
@@ -169,6 +169,26 @@
         100)); \
 }
 
+// Summary of all histograms Perceived PLT histograms:
+// (all prefixed PerceivedPLT)
+// PerceivedPLT -- Perceived Pageloadtimes (PPLT) for all pages in the group.
+// ...Windowed -- PPLT for pages in the 30s after a prerender.
+// ...Matched -- A prerendered page that was swapped in.
+// ...MatchedComplete -- A prerendered page that was swapped in + a few
+// that were not swapped in so that the set of pages lines up more closely with
+// the control group.
+// ...FirstAfterMiss -- First page to finish loading after a prerender, which
+// is different from the page that was prerendered.
+// ...FirstAfterMissNonOverlapping -- Same as FirstAfterMiss, but only
+// triggering for the first page to finish after the prerender that also started
+// after the prerender started.
+// ...FirstAfterMissBoth -- pages meeting
+// FirstAfterMiss AND FirstAfterMissNonOverlapping
+// ...FirstAfterMissAnyOnly -- pages meeting
+// FirstAfterMiss but NOT FirstAfterMissNonOverlapping
+// ..FirstAfterMissNonOverlappingOnly -- pages meeting
+// FirstAfterMissNonOverlapping but NOT FirstAfterMiss
+
 void PrerenderHistograms::RecordPerceivedPageLoadTime(
     base::TimeDelta perceived_page_load_time, bool was_prerender,
     bool was_complete_prerender, const GURL& url) {
@@ -266,6 +286,17 @@
       UMA_HISTOGRAM_ENUMERATION(name, final_status, FINAL_STATUS_MAX));
 }
 
+void PrerenderHistograms::RecordFinalStatusMatchComplete(
+    Origin origin,
+    uint8 experiment_id,
+    FinalStatus final_status) const {
+  DCHECK(final_status != FINAL_STATUS_MAX);
+  PREFIXED_HISTOGRAM_ORIGIN_EXPERIMENT(
+      base::FieldTrial::MakeName("FinalStatusMatchComplete", "Prerender"),
+      origin, experiment_id,
+      UMA_HISTOGRAM_ENUMERATION(name, final_status, FINAL_STATUS_MAX));
+}
+
 uint8 PrerenderHistograms::GetCurrentExperimentId() const {
   if (!WithinWindow())
     return kNoExperiment;