[mojo-edk] Make the Mojo EDK compile under NaCl.

mojo/edk/embedder/platform_channel_pair_posix.cc

Index: mojo/edk/embedder/platform_channel_pair_posix.cc
diff --git a/mojo/edk/embedder/platform_channel_pair_posix.cc b/mojo/edk/embedder/platform_channel_pair_posix.cc
index 9c3883922fdb004d3ba0a6f11628f71835818953..4dcf48bd71bfe417588e9ba2d0dfd7b1bb67d65f 100644
--- a/mojo/edk/embedder/platform_channel_pair_posix.cc
+++ b/mojo/edk/embedder/platform_channel_pair_posix.cc
@@ -7,7 +7,6 @@
 #include <fcntl.h>
 #include <stddef.h>
 #include <stdint.h>
-#include <sys/socket.h>
 #include <sys/types.h>
 #include <unistd.h>
 
@@ -21,6 +20,12 @@
 #include "build/build_config.h"
 #include "mojo/edk/embedder/platform_handle.h"
 
+#if !defined(OS_NACL) || defined(OS_NACL_NONSFI)
+#include <sys/socket.h>
+#else
+#include "native_client/src/public/imc_syscalls.h"
+#endif
+
 #if !defined(SO_PEEK_OFF)
 #define SO_PEEK_OFF 42
 #endif
@@ -47,6 +52,9 @@ PlatformChannelPair::PlatformChannelPair(bool client_is_blocking) {
   int fds[2];
   // TODO(vtl): Maybe fail gracefully if |socketpair()| fails.
 
+#if defined(OS_NACL) && !defined(OS_NACL_NONSFI)
+  PCHECK(imc_socketpair(fds) == 0);
+#else
   PCHECK(socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == 0);
 
   // Set the ends to nonblocking.
@@ -64,6 +72,7 @@ PlatformChannelPair::PlatformChannelPair(bool client_is_blocking) {
   PCHECK(setsockopt(fds[1], SOL_SOCKET, SO_NOSIGPIPE, &no_sigpipe,
                     sizeof(no_sigpipe)) == 0);
 #endif  // defined(OS_MACOSX)
+#endif  // defined(OS_NACL) && !defined(OS_NACL_NONSFI)
 
   server_handle_.reset(PlatformHandle(fds[0]));
   DCHECK(server_handle_.is_valid());