HostResolver is exposed to plugin.

ppapi/proxy/ppapi_param_traits.h

Index: ppapi/proxy/ppapi_param_traits.h
diff --git a/ppapi/proxy/ppapi_param_traits.h b/ppapi/proxy/ppapi_param_traits.h
index 63121f0dd384cff6c4df39614e73096723b90df1..727cccc529778e2a8702a9c984f9c304d767214b 100644
--- a/ppapi/proxy/ppapi_param_traits.h
+++ b/ppapi/proxy/ppapi_param_traits.h
@@ -15,10 +15,12 @@
 #include "ppapi/c/pp_var.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
 #include "ppapi/shared_impl/ppb_file_ref_shared.h"
+#include "ppapi/shared_impl/private/ppb_host_resolver_shared.h"
 
 struct PP_FileInfo;
-struct PP_ObjectProperty;
+struct PP_HostResolver_Private_Hint;
 struct PP_NetAddress_Private;
+struct PP_ObjectProperty;
 
 namespace ppapi {
 
@@ -54,6 +56,14 @@ struct ParamTraits<PP_FileInfo> {
   static void Log(const param_type& p, std::string* l);
 };
 
+template<>
+struct ParamTraits<PP_HostResolver_Private_Hint> {
+  typedef PP_HostResolver_Private_Hint param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
 template <>
 struct PPAPI_PROXY_EXPORT ParamTraits<PP_NetAddress_Private> {
   typedef PP_NetAddress_Private param_type;
@@ -111,6 +121,14 @@ struct ParamTraits<ppapi::proxy::SerializedFontDescription> {
 };
 
 template<>
+struct ParamTraits<ppapi::HostPortPair> {
+  typedef ppapi::HostPortPair param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template<>
 struct ParamTraits<ppapi::HostResource> {
   typedef ppapi::HostResource param_type;
   static void Write(Message* m, const param_type& p);
@@ -119,6 +137,22 @@ struct ParamTraits<ppapi::HostResource> {
 };
 
 template<>
+struct ParamTraits<ppapi::NameAndAddressPair> {
+  typedef ppapi::NameAndAddressPair param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template<>
+struct ParamTraits<ppapi::NetworkList> {
+  typedef ppapi::NetworkList param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template<>
 struct ParamTraits<ppapi::proxy::SerializedVar> {
   typedef ppapi::proxy::SerializedVar param_type;
   static void Write(Message* m, const param_type& p);