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diff --git a/chromium/chrome/browser/net/dns_probe_service_factory.h b/chromium/chrome/browser/net/dns_probe_service_factory.h
new file mode 100644
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+++ b/chromium/chrome/browser/net/dns_probe_service_factory.h
@@ -0,0 +1,73 @@
+// Copyright 2019 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 CHROME_BROWSER_NET_DNS_PROBE_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_NET_DNS_PROBE_SERVICE_FACTORY_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/singleton.h"
+#include "base/time/tick_clock.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+#include "services/network/public/mojom/host_resolver.mojom.h"
+
+class KeyedService;
+
+namespace content {
+class BrowserContext;
+}
+
+namespace network {
+namespace mojom {
+class NetworkContext;
+}
+}  // namespace network
+
+namespace chrome_browser_net {
+
+class DnsProbeService;
+
+class DnsProbeServiceFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  using NetworkContextGetter =
+      base::RepeatingCallback<network::mojom::NetworkContext*(void)>;
+  using DnsConfigChangeManagerGetter =
+      base::RepeatingCallback<network::mojom::DnsConfigChangeManagerPtr(void)>;
+
+  // Returns the DnsProbeService that supports NetworkContexts for
+  // |browser_context|.
+  static DnsProbeService* GetForContext(
+      content::BrowserContext* browser_context);
+
+  // Returns the NetworkContextServiceFactory singleton.
+  static DnsProbeServiceFactory* GetInstance();
+
+  // Creates a DnsProbeService which will use the supplied
+  // |network_context_getter| and |dns_config_change_manager_getter| instead of
+  // getting them from a BrowserContext, and uses |tick_clock| for cache
+  // expiration.
+  static std::unique_ptr<DnsProbeService> CreateForTesting(
+      const NetworkContextGetter& network_context_getter,
+      const DnsConfigChangeManagerGetter& dns_config_change_manager_getter,
+      const base::TickClock* tick_clock);
+
+ private:
+  friend struct base::DefaultSingletonTraits<DnsProbeServiceFactory>;
+
+  DnsProbeServiceFactory();
+  ~DnsProbeServiceFactory() override;
+
+  // BrowserContextKeyedServiceFactory implementation:
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const override;
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(DnsProbeServiceFactory);
+};
+
+}  // namespace chrome_browser_net
+
+#endif  // CHROME_BROWSER_NET_DNS_PROBE_SERVICE_FACTORY_H_