Precache should cancel when there is user traffic

components/precache/content/precache_manager.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/content/precache_manager.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 196 matching lines @@
     precache_fetcher_.reset();
   }
   precache_completion_callback_.Reset();
 }
 
 bool PrecacheManager::IsPrecaching() const {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   return is_precaching_;
 }
 
+void PrecacheManager::UpdatePrecacheMetricsAndState(
+    const GURL& url,
+    const GURL& referrer,
+    const base::TimeDelta& latency,
+    const base::Time& fetch_time,
+    int64_t size,
+    bool was_cached,
+    bool is_user_traffic) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  RecordStatsForFetch(url, referrer, latency, fetch_time, size, was_cached);
+  if (is_user_traffic && IsPrecaching())
+    CancelPrecaching();
+}
+
 void PrecacheManager::RecordStatsForFetch(const GURL& url,
                                           const GURL& referrer,
                                           const base::TimeDelta& latency,
                                           const base::Time& fetch_time,
                                           int64_t size,
                                           bool was_cached) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   if (size == 0 || url.is_empty() || !url.SchemeIsHTTPOrHTTPS()) {
     // Ignore empty responses, empty URLs, or URLs that aren't HTTP or HTTPS.
@@ skipping 101 matching lines @@
       this));
   precache_fetcher_->Start();
 }
 
 void PrecacheManager::OnHostsReceivedThenDone(
     const history::TopHostsList& host_counts) {
   OnDone();
 }
 
 }  // namespace precache