Set up a NaCl load status callback to start replacing "start_module".

components/nacl/renderer/trusted_plugin_channel.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_NACL_RENDERER_TRUSTED_PLUGIN_CHANNEL_H_
 #define COMPONENTS_NACL_RENDERER_TRUSTED_PLUGIN_CHANNEL_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "ipc/ipc_listener.h"
+#include "native_client/src/trusted/service_runtime/nacl_error_code.h"
 #include "ppapi/c/pp_instance.h"
 
 namespace base {
 class WaitableEvent;
 }  // namespace base
 
 namespace IPC {
 struct ChannelHandle;
 class Message;
 class SyncChannel;
 }  // namespace IPC
 
 namespace nacl {
 class NexeLoadManager;
 
 class TrustedPluginChannel : public IPC::Listener {
  public:
   TrustedPluginChannel(NexeLoadManager* nexe_load_manager,
                        const IPC::ChannelHandle& handle,
                        base::WaitableEvent* shutdown_event,
-                       bool report_exit_status);
+                       bool is_helper_nexe);
   ~TrustedPluginChannel() override;
 
   bool Send(IPC::Message* message);
 
   // Listener implementation.
   bool OnMessageReceived(const IPC::Message& message) override;
   void OnChannelError() override;
 
   void OnReportExitStatus(int exit_status);
+  void OnReportLoadStatus(NaClErrorCode load_status);
 
  private:
   // Non-owning pointer. This is safe because the TrustedPluginChannel is owned
   // by the NexeLoadManager pointed to here.
   NexeLoadManager* nexe_load_manager_;
   scoped_ptr<IPC::SyncChannel> channel_;
-  bool report_exit_status_;
+  bool is_helper_nexe_;
 
   DISALLOW_COPY_AND_ASSIGN(TrustedPluginChannel);
 };
 
 }  // namespace nacl
 
 #endif  // COMPONENTS_NACL_RENDERER_TRUSTED_PLUGIN_CHANNEL_H_