Fix remaining incompatibilities between scoped_ptr and unique_ptr.

ppapi/proxy/raw_var_data.cc

Index: ppapi/proxy/raw_var_data.cc
diff --git a/ppapi/proxy/raw_var_data.cc b/ppapi/proxy/raw_var_data.cc
index 6e4e0577d5f41fb929adc8673d5c51e3a8b81761..bb67dc017fb81fc8229451acd4c742dce880c768 100644
--- a/ppapi/proxy/raw_var_data.cc
+++ b/ppapi/proxy/raw_var_data.cc
@@ -717,7 +717,7 @@ void ResourceRawVarData::Write(IPC::Message* m,
   m->WriteInt(static_cast<int>(pp_resource_));
   m->WriteInt(pending_renderer_host_id_);
   m->WriteInt(pending_browser_host_id_);
-  m->WriteBool(creation_message_);
+  m->WriteBool(!!creation_message_);
   if (creation_message_)
     IPC::WriteParam(m, *creation_message_);
 }