net: move host_resolver files from net/base to net/dns

net/dns/single_request_host_resolver_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/base/single_request_host_resolver.h"
+#include "net/dns/single_request_host_resolver.h"
 
 #include "net/base/address_list.h"
-#include "net/base/mock_host_resolver.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log.h"
 #include "net/base/test_completion_callback.h"
+#include "net/dns/mock_host_resolver.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 
 namespace {
 
 // Helper class used by SingleRequestHostResolverTest.Cancel test.
 // It checks that only one request is outstanding at a time, and that
 // it is cancelled before the class is destroyed.
 class HangingHostResolver : public HostResolver {
@@ skipping 93 matching lines @@
   SingleRequestHostResolver single_request_resolver(&resolver);
   single_request_resolver.Cancel();
 
   // To pass, HangingHostResolver should not have received a cancellation
   // request (since there is nothing to cancel). If it does, it will crash.
 }
 
 } // namespace
 
 }  // namespace net