Non-SFI mode: Use dummy PID for NaCl's IPC channel on Linux platform.

ipc/ipc_channel.cc

Index: ipc/ipc_channel.cc
diff --git a/ipc/ipc_channel.cc b/ipc/ipc_channel.cc
index 4a4e40ddc1fb82bfa2bbeeff49cf0917b252ef7a..ae7e7a4aa738c69917299cd8a2872fe08cd6d43f 100644
--- a/ipc/ipc_channel.cc
+++ b/ipc/ipc_channel.cc
@@ -29,7 +29,13 @@ std::string Channel::GenerateUniqueRandomChannelID() {
   // component. The strong random component prevents other processes from
   // hijacking or squatting on predictable channel names.
 
+#if defined(OS_NACL_NONSFI)
+  // nacl_helper_nonsfi does not allow to use getpid() (it would cause SIGSYS

[dmichael (off chromium), 2014/11/05 23:48:41]

nit: the grammar here could be better. How about:
// The seccomp sandbox disallows the use of getpid(), so we provide
// a dummy PID.

[hidehiko, 2014/11/06 14:19:30]

Done. Thank you for suggestion.

+  // crashing because of seccomp sandbox), so here we use dummy PID.
+  int process_id = -1;
+#else
   int process_id = base::GetCurrentProcId();
+#endif
   return base::StringPrintf("%d.%u.%d",
       process_id,
       g_last_id.GetNext(),