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

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
index e07a08267ddb900e1f0c878631c7e2599a5d0196..38da59cf4b2169458fa9a93bb0859b9c26f87795 100644
--- a/components/nacl/common/nacl_renderer_messages.h
+++ b/components/nacl/common/nacl_renderer_messages.h
@@ -13,3 +13,8 @@
 // NaCl to the renderer before the NaCl process exits very soon after.
 IPC_SYNC_MESSAGE_CONTROL1_0(NaClRendererMsg_ReportExitStatus,
                             int /* exit_status */)
+
+// This message must be synchronous to ensure that the load status is sent from
+// NaCl to the renderer before the NaCl process exits very soon after.
+IPC_SYNC_MESSAGE_CONTROL1_0(NaClRendererMsg_ReportLoadStatus,
+                            int /* load_status */)

[Will Harris, 2015/04/22 00:41:01]

Any reason why you use int here?

This should be enum NaClErrorCode with IPC_ENUM_TRAITS_MAX_VALUE set to
NACL_ERROR_CODE_MAX.

http://www.chromium.org/Home/chromium-security/education/security-tips-for-ip....

[jvoung (off chromium), 2015/04/22 21:45:21]

Done.