Convert resources to take an instance key instead of an Instance*.

ppapi/cpp/url_response_info.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/cpp/url_response_info.h"
 
 #include "ppapi/cpp/file_ref.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/module_impl.h"
 
 namespace pp {
 
 namespace {
 
 template <> const char* interface_name<PPB_URLResponseInfo>() {
   return PPB_URLRESPONSEINFO_INTERFACE;
 }
 
 }  // namespace
 
 URLResponseInfo::URLResponseInfo(const URLResponseInfo& other)
     : Resource(other) {
 }
 
-URLResponseInfo::URLResponseInfo(PassRef, PP_Resource resource) {
-  PassRefFromConstructor(resource);
+URLResponseInfo::URLResponseInfo(PassRef, PP_Resource resource)
+    : Resource(PASS_REF, resource) {
 }
 
 Var URLResponseInfo::GetProperty(PP_URLResponseProperty property) const {
   if (!has_interface<PPB_URLResponseInfo>())
     return Var();
-  return Var(Var::PassRef(),
+  return Var(PASS_REF,
              get_interface<PPB_URLResponseInfo>()->GetProperty(pp_resource(),
                                                                property));
 }
 
 FileRef URLResponseInfo::GetBodyAsFileRef() const {
   if (!has_interface<PPB_URLResponseInfo>())
     return FileRef();
-  return FileRef(FileRef::PassRef(),
+  return FileRef(PASS_REF,
                  get_interface<PPB_URLResponseInfo>()->GetBodyAsFileRef(
                      pp_resource()));
 }
 
 }  // namespace pp