Add a load_status callback hook that is invoked at the end of chrome LoadApp.

src/public/chrome_main.h

Index: src/public/chrome_main.h
diff --git a/src/public/chrome_main.h b/src/public/chrome_main.h
index 96885b38edbe2b76c70ded780857d9b86da83886..c652a8fc4a78f78ab8e4c10eca65799c5a77dc68 100644
--- a/src/public/chrome_main.h
+++ b/src/public/chrome_main.h
@@ -234,6 +234,13 @@ void NaClChromeMainInit(void);
  */
 void NaClSetFatalErrorCallback(void (*func)(const char *data, size_t bytes));
 
+/*
+ * Sets a function to be called when the initial module load status
+ * from a call to NaClChromeMainStart is known (load_status is a value from
+ * the the NaClErrorCode enumeration and may indicate success or error).
+ */
+void NaClSetLoadStatusCallback(void (*func)(int load_status));

[Mark Seaborn, 2015/04/17 23:15:54]

Can you make this callback a field in NaClChromeMainArgs rather than a global,
please?

NaClSetFatalErrorCallback() only sets a global because it affects how
NaClLog()+LOG_FATAL is handled.

[jvoung (off chromium), 2015/04/18 00:58:17]

Done -- ah, didn't realize why that was global.

+
 /* Create a new args struct containing default values. */
 struct NaClChromeMainArgs *NaClChromeMainArgsCreate(void);