[Prerender] first contentful paint histograms.

chrome/browser/prerender/prerender_histograms.cc

Index: chrome/browser/prerender/prerender_histograms.cc
diff --git a/chrome/browser/prerender/prerender_histograms.cc b/chrome/browser/prerender/prerender_histograms.cc
index 4e97663049a8d3e75b14b55e98a28ec60af7f2cc..2955b0add71727f813a5f418f9d17ccd7a83a899 100644
--- a/chrome/browser/prerender/prerender_histograms.cc
+++ b/chrome/browser/prerender/prerender_histograms.cc
@@ -310,6 +310,27 @@ void PrerenderHistograms::RecordPerceivedPageLoadTime(
   }
 }
 
+void PrerenderHistograms::RecordPerceivedFirstContentfulPaintTime(
+    Origin origin,
+    base::TimeDelta perceived_first_contentful_paint,
+    bool was_hidden) {
+  RecordHistogramTime(GetPerceivedFirstContentfulPaintHistogramName(
+                          origin, IsOriginWash(), was_hidden),
+                      base::TimeDelta::FromMilliseconds(10),
+                      base::TimeDelta::FromMinutes(2),
+                      perceived_first_contentful_paint, 50);
+}
+
+void PrerenderHistograms::RecordPerceivedFirstContentfulPaintStatus(
+    Origin origin,
+    bool successful,
+    bool was_hidden) {
+  RecordHistogramEnum(
+      GetHistogramName(origin, IsOriginWash(), "PerceivedTTFCPRecorded") +
+          FirstContentfulPaintHiddenName(was_hidden),
+      successful ? 1 : 0, 2);
+}
+
 void PrerenderHistograms::RecordPageLoadTimeNotSwappedIn(
     Origin origin,
     base::TimeDelta page_load_time,
@@ -452,7 +473,7 @@ void PrerenderHistograms::RecordPrefetchRedirectCount(
   RecordHistogramEnum(histogram_name, redirect_count, kMaxRedirectCount);
 }
 
-void PrerenderHistograms::RecordFirstContentfulPaint(
+void PrerenderHistograms::RecordNoStateFirstContentfulPaint(
     Origin origin,
     bool is_no_store,
     base::TimeDelta time,
@@ -467,7 +488,7 @@ void PrerenderHistograms::RecordFirstContentfulPaint(
                         base::TimeDelta::FromMinutes(30), prefetch_age, 50);
   }
 
-  RecordHistogramTime(GetFirstContentfulPaintHistogramName(
+  RecordHistogramTime(GetNoStateFirstContentfulPaintHistogramName(
                           origin, IsOriginWash(), is_no_store, prefetch_age),
                       base::TimeDelta::FromMilliseconds(10),
                       base::TimeDelta::FromMinutes(2), time, 50);
@@ -480,7 +501,7 @@ bool PrerenderHistograms::IsOriginWash() const {
 }
 
 // static
-std::string PrerenderHistograms::GetFirstContentfulPaintHistogramName(
+std::string PrerenderHistograms::GetNoStateFirstContentfulPaintHistogramName(
     Origin origin,
     bool is_wash,
     bool is_no_store,
@@ -499,4 +520,18 @@ std::string PrerenderHistograms::GetFirstContentfulPaintHistogramName(
   return GetHistogramName(origin, is_wash, histogram_base_name);
 }
 
+// static
+std::string PrerenderHistograms::GetPerceivedFirstContentfulPaintHistogramName(
+    Origin origin,
+    bool is_wash,
+    bool was_hidden) {
+  return GetHistogramName(origin, is_wash, "PerceivedTTFCP") +
+         FirstContentfulPaintHiddenName(was_hidden);
+}
+
+std::string PrerenderHistograms::FirstContentfulPaintHiddenName(
+    bool was_hidden) {
+  return was_hidden ? ".Hidden" : ".Visible";
+}
+
 }  // namespace prerender