Add an IPC channel between the NaCl loader process and the renderer.

ppapi/c/private/ppb_nacl_private.h

Index: ppapi/c/private/ppb_nacl_private.h
===================================================================
--- ppapi/c/private/ppb_nacl_private.h	(revision 133072)
+++ ppapi/c/private/ppb_nacl_private.h	(working copy)
@@ -18,7 +18,8 @@
   // the function will write the process ID of the created process to
   // |nacl_process_id|.  Unless EnableBackgroundSelLdrLaunch is called, this
   // method must be invoked from the main thread.
-  bool (*LaunchSelLdr)(const char* alleged_url, int socket_count,
+  bool (*LaunchSelLdr)(int instance,

[dmichael (off chromium), 2012/04/27 17:14:36]

It would be clearer to use PP_Instance, since that's what it is interpreted as.

[bbudge, 2012/04/27 17:46:56]

Yeah, this is supposed to be PP_Instance. Mark Seaborn is moving some stuff from
the NaCl repo which made it easier to use an int.
On 2012/04/27 17:14:36, dmichael wrote:

+                       const char* alleged_url, int socket_count,
                        void* imc_handles, void* nacl_process_handle,
                        int* nacl_process_id);