Pepper: Simplify Pnacl manifest id logic.

ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.h

Index: ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.h
diff --git a/ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.h b/ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.h
index 77152e3b83d3b3042b3d064eca5bb32b6e2ebe26..4cdc304a8482c22b54c167914cb7567546435ae3 100644
--- a/ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.h
+++ b/ppapi/native_client/src/trusted/plugin/pnacl_translate_thread.h
@@ -42,7 +42,6 @@ class PnaclTranslateThread {
   // Start the translation process. It will continue to run and consume data
   // as it is passed in with PutBytes.
   void RunTranslate(const pp::CompletionCallback& finish_callback,
-                    int32_t manifest_id,
                     const std::vector<TempFile*>* obj_files,
                     TempFile* nexe_file,
                     nacl::DescWrapper* invalid_desc_wrapper,
@@ -110,7 +109,6 @@ class PnaclTranslateThread {
   int64_t compile_time_;
 
   // Data about the translation files, owned by the coordinator
-  int32_t manifest_id_;
   const std::vector<TempFile*>* obj_files_;
   TempFile* nexe_file_;
   nacl::DescWrapper* invalid_desc_wrapper_;