Prototype: Use Chromium IPC for plugin LOAD_MODULE.

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

 /* -*- c++ -*- */
 /*
  * Copyright (c) 2012 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.
  */
 
 // A class containing information regarding a socket connection to a
 // service runtime instance.
 
@@ skipping 214 matching lines @@
                  const Manifest* manifest,
                  bool should_report_uma,
                  pp::CompletionCallback init_done_cb,
                  pp::CompletionCallback crash_cb);
   // The destructor terminates the sel_ldr process.
   ~ServiceRuntime();
 
   // Spawn the sel_ldr instance. On success, returns true.
   // On failure, returns false and |error_string| is set to something
   // describing the error.
-  bool StartSelLdr(const SelLdrStartParams& params);
+  void StartSelLdr(const SelLdrStartParams& params,
+                   PP_CompletionCallback callback);
 
   // If starting sel_ldr from a background thread, wait for sel_ldr to
   // actually start.
   void WaitForSelLdrStart();
 
   // Signal to waiting threads that StartSelLdr is complete.
   // Done externally, in case external users want to write to shared
   // memory that is yet to be fenced.
   void SignalStartSelLdrDone();
 
@@ skipping 39 matching lines @@
 
   PluginReverseInterface* rev_interface_;
 
   // Mutex to protect exit_status_.
   // Also, in conjunction with cond_ it is used to signal when
   // StartSelLdr is complete with either success or error.
   NaClMutex mu_;
   NaClCondVar cond_;
   int exit_status_;
   bool start_sel_ldr_done_;
+
+  PP_Var start_sel_ldr_error_message_;
 };
 
 }  // namespace plugin
 
 #endif  // NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_SERVICE_RUNTIME_H_