net: Add fuzzer for HostResolverImpl.

net/dns/dns_transaction_unittest.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/dns/dns_transaction.h"
 
 #include <stdint.h>
 
 #include <limits>
 #include <memory>
@@ skipping 327 matching lines @@
     for (unsigned i = 0; i < num_servers; ++i) {
       config_.nameservers.push_back(
           IPEndPoint(IPAddress(192, 168, 1, i), dns_protocol::kDefaultPort));
     }
   }
 
   // Called after fully configuring |config|.
   void ConfigureFactory() {
     socket_factory_.reset(new TestSocketFactory());
     session_ = new DnsSession(
-        config_,
-        DnsSocketPool::CreateNull(socket_factory_.get()),
+        config_, DnsSocketPool::CreateNull(socket_factory_.get(),
+                                           base::Bind(base::RandInt)),
         base::Bind(&DnsTransactionTest::GetNextId, base::Unretained(this)),
         NULL /* NetLog */);
     transaction_factory_ = DnsTransactionFactory::CreateFactory(session_.get());
   }
 
   void AddSocketData(std::unique_ptr<DnsSocketData> data) {
     CHECK(socket_factory_.get());
     transaction_ids_.push_back(data->query_id());
     socket_factory_->AddSocketDataProvider(data->GetProvider());
     socket_data_.push_back(std::move(data));
@@ skipping 633 matching lines @@
   config_.timeout = TestTimeouts::tiny_timeout();
   ConfigureFactory();
 
   TransactionHelper helper0(".", dns_protocol::kTypeA, ERR_INVALID_ARGUMENT);
   EXPECT_TRUE(helper0.Run(transaction_factory_.get()));
 }
 
 }  // namespace
 
 }  // namespace net