Add a flag to LaunchSelLdr to skip grabbing a routing_id.

ppapi/api/private/ppb_nacl_private.idl

Index: ppapi/api/private/ppb_nacl_private.idl
diff --git a/ppapi/api/private/ppb_nacl_private.idl b/ppapi/api/private/ppb_nacl_private.idl
index 2dad7fe3f0bc3ce93e330b0adc7f1bd54909927c..a9e366d74a5ba034f9971420e4b846f239ba9f54 100644
--- a/ppapi/api/private/ppb_nacl_private.idl
+++ b/ppapi/api/private/ppb_nacl_private.idl
@@ -35,6 +35,7 @@ interface PPB_NaCl_Private {
    */

[bbudge, 2012/11/29 02:12:02]

We should probably add a comment for |uses_ppapi| and how if it's false this can
be called off the main thread.

[jvoung (off chromium), 2012/11/29 22:46:46]

Done.

   PP_NaClResult LaunchSelLdr([in] PP_Instance instance,
                              [in] str_t alleged_url,
+                             [in] PP_Bool uses_ppapi,
                              [in] PP_Bool enable_ppapi_dev,
                              [in] int32_t socket_count,
                              [out] mem_t imc_handles);