Added HttpUtils::HasValidators and HttpResponse::HasValidators

components/precache/core/precache_fetcher.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_fetcher.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 173 matching lines @@
     // they expire from the cache minutes after we request them.
     url_fetcher_network_->SetLoadFlags(kNoTracking);
   }
   url_fetcher_network_->Start();
 }
 
 void PrecacheFetcher::Fetcher::OnURLFetchComplete(const URLFetcher* source) {
   if (fetch_stage_ == FetchStage::CACHE &&
       (source->GetStatus().error() == net::ERR_CACHE_MISS ||
        (source->GetResponseHeaders() &&
-        source->GetResponseHeaders()->HasStrongValidators()))) {
+        source->GetResponseHeaders()->HasValidators()))) {
     // If the resource was not found in the cache, request it from the
     // network.
     //
     // If the resource was found in the cache, but contains validators,
     // request a refresh. The presence of validators increases the chance that
     // we get a 304 response rather than a full one, thus allowing us to
     // refresh the cache with minimal network load.
     //
     // TODO(twifkak): Add support for weak validators, which should be just as
     // likely a guarantee that the response will be a 304.
@@ skipping 166 matching lines @@
   StartNextFetch();
 }
 
 void PrecacheFetcher::OnResourceFetchComplete(const URLFetcher& source) {
   // The resource has already been put in the cache during the fetch process, so
   // nothing more needs to be done for the resource.
   StartNextFetch();
 }
 
 }  // namespace precache