[NaCl SDK] nacl_io: add return value to nacl_io_init.

native_client_sdk/src/libraries/nacl_io/nacl_io.h

Index: native_client_sdk/src/libraries/nacl_io/nacl_io.h
diff --git a/native_client_sdk/src/libraries/nacl_io/nacl_io.h b/native_client_sdk/src/libraries/nacl_io/nacl_io.h
index 21abc3463259d422b49bb841c361a5fae59c93c1..c6ed47262171ef65ce1f8c10054380392be3d8cf 100644
--- a/native_client_sdk/src/libraries/nacl_io/nacl_io.h
+++ b/native_client_sdk/src/libraries/nacl_io/nacl_io.h
@@ -29,7 +29,7 @@ typedef void (*nacl_io_mount_callback_t)(const char* source,
  * NOTE: If you initialize nacl_io with this constructor, you cannot
  * use any filesystems that require PPAPI; e.g. persistent storage, etc.
  */
-void nacl_io_init();
+int nacl_io_init();
 
 /**
  * Initialize nacl_io with PPAPI support.
@@ -49,7 +49,7 @@ void nacl_io_init();
  *   |get_interface| can be retrieved via
  *       pp::Module::Get()->get_browser_interface()
  */
-void nacl_io_init_ppapi(PP_Instance instance, PPB_GetInterface get_interface);
+int nacl_io_init_ppapi(PP_Instance instance, PPB_GetInterface get_interface);
 
 /**
  * Uninitialize nacl_io.
@@ -57,7 +57,7 @@ void nacl_io_init_ppapi(PP_Instance instance, PPB_GetInterface get_interface);
  * This removes interception for POSIX C-library function and releases
  * any associated resources.
  */
-void nacl_io_uninit();
+int nacl_io_uninit();
 
 void nacl_io_set_exit_callback(nacl_io_exit_callback_t exit_callback,
                                void* user_data);