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

net/dns/single_request_host_resolver_unittest.cc

Index: net/dns/single_request_host_resolver_unittest.cc
diff --git a/net/base/single_request_host_resolver_unittest.cc b/net/dns/single_request_host_resolver_unittest.cc
similarity index 97%
rename from net/base/single_request_host_resolver_unittest.cc
rename to net/dns/single_request_host_resolver_unittest.cc
index b23a722e0496c5e9b3e8bcac7ac9ea65dac0947e..3e2ea1ece01361c7a9a9defde92e72eb066587e0 100644
--- a/net/base/single_request_host_resolver_unittest.cc
+++ b/net/dns/single_request_host_resolver_unittest.cc
@@ -2,13 +2,13 @@
 // 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 {