Add Precache.CacheStatus.NonPrefetch.FromPrecache.

components/precache/core/precache_database.cc

 // Copyright 2013 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 "components/precache/core/precache_database.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 238 matching lines @@
     // buffer.
     Flush();
   }
 
   bool is_precached = precache_url_table_.IsURLPrecachedAndUnused(url);
   if (info.was_cached && !is_precached) {
     // Ignore cache hits that precache can't take credit for.
     return;
   }
 
+  if (is_precached)

[Raj, 2016/09/26 22:09:58]

nit: add the multiline statement inside parentheses.

[twifkak, 2016/09/26 22:57:05]

Done.

+    UMA_HISTOGRAM_ENUMERATION(
+        "Precache.CacheStatus.NonPrefetch.FromPrecache",
+        info.cache_entry_status,
+        net::HttpResponseInfo::CacheEntryStatus::ENTRY_MAX);
+
   base::HistogramBase::Sample size_sample =
       static_cast<base::HistogramBase::Sample>(size);
   if (!info.was_cached) {
     // The fetch was served over the network during user browsing, so count it
     // as downloaded non-precache bytes.
     UMA_HISTOGRAM_COUNTS("Precache.DownloadedNonPrecache", size_sample);
     if (is_connection_cellular) {
       UMA_HISTOGRAM_COUNTS("Precache.DownloadedNonPrecache.Cellular",
                            size_sample);
     }
@@ skipping 159 matching lines @@
 
 void PrecacheDatabase::DeleteUnfinishedWork() {
   precache_session_table_.DeleteUnfinishedWork();
 }
 
 base::WeakPtr<PrecacheDatabase> PrecacheDatabase::GetWeakPtr() {
   return weak_factory_.GetWeakPtr();
 }
 
 }  // namespace precache