Add UMA Precache.Freshness.Prefetch

chrome/browser/precache/precache_util.cc

Index: chrome/browser/precache/precache_util.cc
diff --git a/chrome/browser/precache/precache_util.cc b/chrome/browser/precache/precache_util.cc
index 80ec4a1e9756d8814a4ba4d9ed45304b4940e112..b13c48a210721d469bd8950399e829c19aeb60dc 100644
--- a/chrome/browser/precache/precache_util.cc
+++ b/chrome/browser/precache/precache_util.cc
@@ -12,6 +12,7 @@
 #include "components/data_use_measurement/content/data_use_measurement.h"
 #include "components/precache/content/precache_manager.h"
 #include "content/public/browser/browser_thread.h"
+#include "net/http/http_response_info.h"
 #include "net/url_request/url_request.h"
 #include "url/gurl.h"
 
@@ -21,8 +22,8 @@ void UpdatePrecacheMetricsAndStateOnUIThread(const GURL& url,
                                              const GURL& referrer,
                                              base::TimeDelta latency,
                                              const base::Time& fetch_time,
+                                             const net::HttpResponseInfo& info,
                                              int64_t size,
-                                             bool was_cached,
                                              bool is_user_traffic,
                                              void* profile_id) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
@@ -38,7 +39,7 @@ void UpdatePrecacheMetricsAndStateOnUIThread(const GURL& url,
     return;
 
   precache_manager->UpdatePrecacheMetricsAndState(
-      url, referrer, latency, fetch_time, size, was_cached, is_user_traffic);
+      url, referrer, latency, fetch_time, info, size, is_user_traffic);
 }
 
 }  // namespace
@@ -63,7 +64,7 @@ void UpdatePrecacheMetricsAndState(const net::URLRequest* request,
       base::Bind(
           &UpdatePrecacheMetricsAndStateOnUIThread, request->url(),
           GURL(request->referrer()), latency, base::Time::Now(),
-          received_content_length, request->was_cached(),
+          request->response_info(), received_content_length,
           data_use_measurement::DataUseMeasurement::IsUserInitiatedRequest(
               request),
           profile_id));