Add UMA Precache.Freshness.Prefetch

chrome/browser/precache/precache_util.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/precache/precache_util.h"
 
 #include "base/time/time.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/precache/precache_manager_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #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/url_request/url_request.h"
 #include "url/gurl.h"
 
+namespace net {
+class HttpResponseInfo;
+}
+
 namespace {
 
 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);
 
   if (!g_browser_process->profile_manager()->IsValidProfile(profile_id))
     return;
   Profile* profile = reinterpret_cast<Profile*>(profile_id);
 
   precache::PrecacheManager* precache_manager =
       precache::PrecacheManagerFactory::GetForBrowserContext(profile);
   // |precache_manager| could be NULL if the profile is off the record.
   if (!precache_manager || !precache_manager->IsPrecachingAllowed())
     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
 
 namespace precache {
 
 // TODO(rajendrant): Add unittests for this function.
 void UpdatePrecacheMetricsAndState(const net::URLRequest* request,
                                    void* profile_id) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
 
   // For better accuracy, we use the actual bytes read instead of the length
   // specified with the Content-Length header, which may be inaccurate,
   // or missing, as is the case with chunked encoding.
   int64_t received_content_length = request->received_response_content_length();
   base::TimeDelta latency = base::TimeTicks::Now() - request->creation_time();
 
   // Record precache metrics when a fetch is completed successfully, if
   // precaching is allowed.
   content::BrowserThread::PostTask(
       content::BrowserThread::UI, FROM_HERE,
       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));
 }
 
 }  // namespace precache