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

net/dns/host_resolver.cc

Index: net/dns/host_resolver.cc
diff --git a/net/base/host_resolver.cc b/net/dns/host_resolver.cc
similarity index 98%
rename from net/base/host_resolver.cc
rename to net/dns/host_resolver.cc
index 7d98dd6fdeaa523e767670bc0bbf1bb344f5c67d..6350d2e3af71579ea42d74058976bd6237c0e848 100644
--- a/net/base/host_resolver.cc
+++ b/net/dns/host_resolver.cc
@@ -2,16 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "net/base/host_resolver.h"
+#include "net/dns/host_resolver.h"
 
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "net/base/host_cache.h"
-#include "net/base/host_resolver_impl.h"
 #include "net/dns/dns_client.h"
 #include "net/dns/dns_config_service.h"
+#include "net/dns/host_resolver_impl.h"
 
 namespace net {