Check if precaching is allowed before reporting related metrics

chrome/browser/net/chrome_network_delegate.cc

Index: chrome/browser/net/chrome_network_delegate.cc
diff --git a/chrome/browser/net/chrome_network_delegate.cc b/chrome/browser/net/chrome_network_delegate.cc
index d69e0eb1a4c4397d0fd21c01eb3284d807baaaf7..413033ba0e91195da63da70affd6e0b564995028 100644
--- a/chrome/browser/net/chrome_network_delegate.cc
+++ b/chrome/browser/net/chrome_network_delegate.cc
@@ -217,8 +217,8 @@ void RecordPrecacheStatsOnUIThread(const GURL& url,
 
   precache::PrecacheManager* precache_manager =
       precache::PrecacheManagerFactory::GetForBrowserContext(profile);
-  if (!precache_manager) {
-    // This could be NULL if the profile is off the record.
+  if (!precache_manager || !precache_manager->IsPrecachingAllowed()) {
+    // |precache_manager| could be NULL if the profile is off the record.
     return;
   }