PPAPI/NaCl: Make NaClIPCAdapter transfer handles more generally

ppapi/shared_impl/ppb_network_list_private_shared.cc

Index: ppapi/shared_impl/ppb_network_list_private_shared.cc
diff --git a/ppapi/shared_impl/ppb_network_list_private_shared.cc b/ppapi/shared_impl/ppb_network_list_private_shared.cc
index 6f8c67ca46ab335ff423b7788c7ed5e343c37c66..043028917cb28122f31971fc87ccd08fff2b515d 100644
--- a/ppapi/shared_impl/ppb_network_list_private_shared.cc
+++ b/ppapi/shared_impl/ppb_network_list_private_shared.cc
@@ -58,7 +58,7 @@ const NetworkList& PPB_NetworkList_Private_Shared::GetNetworkListData() const {
 }
 
 uint32_t PPB_NetworkList_Private_Shared::GetCount() {
-  return list_->list().size();
+  return static_cast<uint32_t>(list_->list().size());
 }
 
 PP_Var PPB_NetworkList_Private_Shared::GetName(uint32_t index) {
@@ -91,7 +91,7 @@ int32_t PPB_NetworkList_Private_Shared::GetIpAddresses(
       count, static_cast<uint32_t>(list_->list().at(index).addresses.size()));
   memcpy(addresses, &(list_->list().at(index).addresses[0]),
          sizeof(PP_NetAddress_Private) * count);
-  return list_->list().at(index).addresses.size();
+  return static_cast<int32_t>(list_->list().at(index).addresses.size());
 }
 
 PP_Var PPB_NetworkList_Private_Shared::GetDisplayName(uint32_t index) {