Update from chromium https://crrev.com/301725/

net/http/http_cache.cc

 // Copyright (c) 2012 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 "net/http/http_cache.h"
 
 #include <algorithm>
 
 #include "base/compiler_specific.h"
 
@@ skipping 264 matching lines @@
 void HttpCache::MetadataWriter::OnIOComplete(int result) {
   if (!verified_)
     return VerifyResponse(result);
   SelfDestroy();
 }
 
 //-----------------------------------------------------------------------------
 
 class HttpCache::QuicServerInfoFactoryAdaptor : public QuicServerInfoFactory {
  public:
-  QuicServerInfoFactoryAdaptor(HttpCache* http_cache)
+  explicit QuicServerInfoFactoryAdaptor(HttpCache* http_cache)
       : http_cache_(http_cache) {
   }
 
   QuicServerInfo* GetForServer(const QuicServerId& server_id) override {
     return new DiskCacheBasedQuicServerInfo(server_id, http_cache_);
   }
 
  private:
   HttpCache* const http_cache_;
 };
@@ skipping 1110 matching lines @@
     building_backend_ = false;
     DeletePendingOp(pending_op);
   }
 
   // The cache may be gone when we return from the callback.
   if (!item->DoCallback(result, disk_cache_.get()))
     item->NotifyTransaction(result, NULL);
 }
 
 }  // namespace net