Convert network hints to Mojo

components/network_hints/browser/network_hints_message_filter.h

-// Copyright 2014 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.
-
-#ifndef COMPONENTS_NETWORK_HINTS_BROWSER_NETWORK_HINTS_MESSAGE_FILTER_H_
-#define COMPONENTS_NETWORK_HINTS_BROWSER_NETWORK_HINTS_MESSAGE_FILTER_H_
-
-#include "base/macros.h"
-#include "content/public/browser/browser_message_filter.h"
-
-namespace net {
-class HostResolver;
-}
-
-namespace network_hints {
-struct LookupRequest;
-
-// Simple browser-side handler for DNS prefetch requests.
-// Passes prefetch requests to the provided net::HostResolver.
-// Each renderer process requires its own filter.
-class NetworkHintsMessageFilter : public content::BrowserMessageFilter {
- public:
-  explicit NetworkHintsMessageFilter(net::HostResolver* host_resolver);
-
-  // content::BrowserMessageFilter implementation:
-  bool OnMessageReceived(const IPC::Message& message) override;
-
- private:
-  ~NetworkHintsMessageFilter() override;
-
-  void OnDnsPrefetch(const LookupRequest& lookup_request);
-
-  net::HostResolver* host_resolver_;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkHintsMessageFilter);
-};
-
-}  // namespace network_hints
-
-#endif  // COMPONENTS_NETWORK_HINTS_BROWSER_NETWORK_HINTS_MESSAGE_FILTER_H_