NaCl bringup of base....

base/platform_thread_posix.cc

Index: base/platform_thread_posix.cc
===================================================================
--- base/platform_thread_posix.cc	(revision 65551)
+++ base/platform_thread_posix.cc	(working copy)
@@ -4,7 +4,6 @@
 
 #include "base/platform_thread.h"
 
-#include <dlfcn.h>
 #include <errno.h>
 #include <sched.h>
 
@@ -15,11 +14,16 @@
 #endif
 
 #if defined(OS_LINUX)
+#include <dlfcn.h>
 #include <sys/prctl.h>
 #include <sys/syscall.h>
 #include <unistd.h>
 #endif
 
+#if defined(OS_NACL)
+#include <sys/nacl_syscalls.h>
+#endif
+
 #include "base/logging.h"
 #include "base/safe_strerror_posix.h"
 
@@ -47,6 +51,8 @@
 #elif defined(OS_FREEBSD)
   // TODO(BSD): find a better thread ID
   return reinterpret_cast<int64>(pthread_self());
+#elif defined(OS_NACL)
+  return pthread_self();
 #endif
 }