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

net/dns/single_request_host_resolver.h

Index: net/dns/single_request_host_resolver.h
diff --git a/net/base/single_request_host_resolver.h b/net/dns/single_request_host_resolver.h
similarity index 90%
rename from net/base/single_request_host_resolver.h
rename to net/dns/single_request_host_resolver.h
index 89d249f576b2f59cb338d72f30e85dc7a9407ac5..52d01328911724a9c00a49749f2d796adb974e1c 100644
--- a/net/base/single_request_host_resolver.h
+++ b/net/dns/single_request_host_resolver.h
@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef NET_BASE_SINGLE_REQUEST_HOST_RESOLVER_H_
-#define NET_BASE_SINGLE_REQUEST_HOST_RESOLVER_H_
+#ifndef NET_DNS_SINGLE_REQUEST_HOST_RESOLVER_H_
+#define NET_DNS_SINGLE_REQUEST_HOST_RESOLVER_H_
 
-#include "net/base/host_resolver.h"
+#include "net/dns/host_resolver.h"
 
 namespace net {
 
@@ -53,4 +53,4 @@ class NET_EXPORT SingleRequestHostResolver {
 
 }  // namespace net
 
-#endif  // NET_BASE_SINGLE_REQUEST_HOST_RESOLVER_H_
+#endif  // NET_DNS_SINGLE_REQUEST_HOST_RESOLVER_H_