[HttpCache] LOAD_ONLY_FROM_CACHE should not imply LOAD_PREFERRING_CACHE

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 <algorithm>
 #include <limits>
 #include <utility>
 #include <vector>
@@ skipping 242 matching lines @@
 PrecacheFetcher::Fetcher::~Fetcher() {}
 
 void PrecacheFetcher::Fetcher::LoadFromCache() {
   fetch_stage_ = FetchStage::CACHE;
   cache_url_fetcher_ =
       net::URLFetcher::Create(url_, net::URLFetcher::GET, this);
   data_use_measurement::DataUseUserData::AttachToFetcher(
       cache_url_fetcher_.get(),
       data_use_measurement::DataUseUserData::PRECACHE);
   cache_url_fetcher_->SetRequestContext(request_context_);
-  cache_url_fetcher_->SetLoadFlags(net::LOAD_ONLY_FROM_CACHE | kNoTracking);
+  cache_url_fetcher_->SetLoadFlags(net::LOAD_ONLY_FROM_CACHE |
+                                   net::LOAD_SKIP_CACHE_VALIDATION |
+                                   kNoTracking);
   std::unique_ptr<URLFetcherNullWriter> null_writer(new URLFetcherNullWriter);
   cache_url_fetcher_->SaveResponseWithWriter(std::move(null_writer));
   cache_url_fetcher_->Start();
 }
 
 void PrecacheFetcher::Fetcher::LoadFromNetwork() {
   fetch_stage_ = FetchStage::NETWORK;
   network_url_fetcher_ =
       net::URLFetcher::Create(url_, net::URLFetcher::GET, this);
   data_use_measurement::DataUseUserData::AttachToFetcher(
@@ skipping 490 matching lines @@
       remaining = 0;
     quota_.set_remaining(
         used_bytes > quota_.remaining() ? 0U : quota_.remaining() - used_bytes);
     db_task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&PrecacheDatabase::SaveQuota, precache_database_, quota_));
   }
 }
 
 }  // namespace precache