Fix host resolver being initialized after network requests arrive to the network service.

content/shell/utility/shell_content_utility_client.cc

 // Copyright 2015 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 "content/shell/utility/shell_content_utility_client.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 72 matching lines @@
  public:
   static void Create(mojom::NetworkServiceTestRequest request) {
     // Leak this.
     new NetworkServiceTestImpl(std::move(request));
   }
   explicit NetworkServiceTestImpl(mojom::NetworkServiceTestRequest request)
       : binding_(this, std::move(request)) {}
   ~NetworkServiceTestImpl() override = default;
 
   // mojom::NetworkServiceTest implementation.
-  void AddRules(std::vector<mojom::RulePtr> rules) override {
+  void AddRules(std::vector<mojom::RulePtr> rules,
+                AddRulesCallback callback) override {
     for (const auto& rule : rules) {
       test_host_resolver_.host_resolver()->AddRule(rule->host_pattern,
                                                    rule->replacement);
     }
+    std::move(callback).Run();
   }
 
  private:
   mojo::Binding<mojom::NetworkServiceTest> binding_;
 
   TestHostResolver test_host_resolver_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkServiceTestImpl);
 };
 
@@ skipping 29 matching lines @@
 
 void ShellContentUtilityClient::BindNetworkServiceTestRequest(
     const service_manager::BindSourceInfo& source_info,
     mojom::NetworkServiceTestRequest request) {
   DCHECK(!network_service_test_);
   network_service_test_ =
       base::MakeUnique<NetworkServiceTestImpl>(std::move(request));
 }
 
 }  // namespace content