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

ppapi/c/private/ppb_nacl_private.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PPAPI_C_PRIVATE_PPB_NACL_UTIL_PRIVATE_H_
 #define PPAPI_C_PRIVATE_PPB_NACL_UTIL_PRIVATE_H_
 
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 
 #define PPB_NACL_PRIVATE_INTERFACE "PPB_NaCl(Private);0.3"
 
 struct PPB_NaCl_Private {
   // This function launches NaCl's sel_ldr process.  On success, the function
   // returns true, otherwise it returns false.  When it returns true, it will
   // write |socket_count| nacl::Handles to imc_handles and will write the
   // nacl::Handle of the created process to |nacl_process_handle|.  Finally,
   // 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);
 
   // On POSIX systems, this function returns the file descriptor of
   // /dev/urandom.  On non-POSIX systems, this function returns 0.
   int (*UrandomFD)(void);
 
   // Whether the Pepper 3D interfaces should be disabled in the NaCl PPAPI
   // proxy. This is so paranoid admins can effectively prevent untrusted shader
   // code to be processed by the graphics stack.
@@ skipping 13 matching lines @@
   // usable with NaClSetBrokerDuplicateHandleFunc() without further
   // wrapping.
   int (*BrokerDuplicateHandle)(void* source_handle,
                                uint32_t process_id,
                                void** target_handle,
                                uint32_t desired_access,
                                uint32_t options);
 };
 
 #endif  // PPAPI_C_PRIVATE_PPB_NACL_PRIVATE_H_