Pepper: Report NaCl exit status over Chromium IPC.

components/nacl/common/nacl_renderer_messages.h

Index: components/nacl/common/nacl_renderer_messages.h
diff --git a/components/nacl/common/nacl_renderer_messages.h b/components/nacl/common/nacl_renderer_messages.h
new file mode 100644
index 0000000000000000000000000000000000000000..e07a08267ddb900e1f0c878631c7e2599a5d0196
--- /dev/null
+++ b/components/nacl/common/nacl_renderer_messages.h
@@ -0,0 +1,15 @@
+// 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.
+
+// Defines messages between the renderer and the NaCl process.
+
+// Multiply-included message file, no traditional include guard.
+#include "ipc/ipc_message_macros.h"
+
+#define IPC_MESSAGE_START NaClHostMsgStart
+
+// This message must be synchronous to ensure that the exit status is sent from
+// NaCl to the renderer before the NaCl process exits very soon after.
+IPC_SYNC_MESSAGE_CONTROL1_0(NaClRendererMsg_ReportExitStatus,
+                            int /* exit_status */)