Make a global enum to differentiate impl & proxy.

ppapi/shared_impl/ppb_url_request_info_shared.cc

Index: ppapi/shared_impl/ppb_url_request_info_shared.cc
diff --git a/ppapi/shared_impl/ppb_url_request_info_shared.cc b/ppapi/shared_impl/ppb_url_request_info_shared.cc
index f582eac328d1540fc0ec3e560bc52575d39c1982..7795b31d9529f3c8fae331b5057f3c1ccdc7b138 100644
--- a/ppapi/shared_impl/ppb_url_request_info_shared.cc
+++ b/ppapi/shared_impl/ppb_url_request_info_shared.cc
@@ -71,16 +71,10 @@ PPB_URLRequestInfo_Data::~PPB_URLRequestInfo_Data() {
 }
 
 PPB_URLRequestInfo_Shared::PPB_URLRequestInfo_Shared(
+    ResourceObjectType type,
     PP_Instance instance,
     const PPB_URLRequestInfo_Data& data)
-    : Resource(instance),
-      data_(data) {
-}
-
-PPB_URLRequestInfo_Shared::PPB_URLRequestInfo_Shared(
-    const HostResource& host_resource,
-    const PPB_URLRequestInfo_Data& data)
-    : Resource(host_resource),
+    : Resource(type, instance),
       data_(data) {
 }