Various changes to make Mojo work under NaCl non-sfi.

mojo/edk/embedder/platform_channel_utils_posix.cc

 // Copyright 2014 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.
 
 #include "mojo/edk/embedder/platform_channel_utils_posix.h"
 
 #include <stddef.h>
 #include <sys/socket.h>
 #include <unistd.h>
 
@@ skipping 41 matching lines @@
 const int kSendFlags = MSG_NOSIGNAL;
 #endif
 
 ssize_t PlatformChannelWrite(PlatformHandle h,
                              const void* bytes,
                              size_t num_bytes) {
   DCHECK(h.is_valid());
   DCHECK(bytes);
   DCHECK_GT(num_bytes, 0u);
 
-#if defined(OS_MACOSX)
+#if defined(OS_MACOSX) || defined(OS_NACL_NONSFI)
+  // send() doesn't appear to work under NaCl-nonsfi.

[Mark Seaborn, 2016/06/20 21:12:15]

You can be more definite: "doesn't appear to work" -> "is not available"

[Anand Mistry (off Chromium), 2016/06/21 00:32:27]

Done.

   return HANDLE_EINTR(write(h.handle, bytes, num_bytes));
 #else
   return send(h.handle, bytes, num_bytes, kSendFlags);
 #endif
 }
 
 ssize_t PlatformChannelWritev(PlatformHandle h,
                               struct iovec* iov,
                               size_t num_iov) {
   DCHECK(h.is_valid());
@@ skipping 114 matching lines @@
         DCHECK(platform_handles->back().is_valid());
       }
     }
   }
 
   return result;
 }
 
 }  // namespace edk
 }  // namespace mojo