Convert remaining scoped_ptr -> std::unique_ptr in //mojo/edk (minus js).

mojo/nacl/monacl_shell_nonsfi.cc

 // Copyright 2015 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 <fcntl.h>
 #include <iostream>
 
 #include "mojo/edk/embedder/embedder.h"
 #include "mojo/edk/embedder/simple_platform_support.h"
 #include "mojo/nacl/irt_mojo_nonsfi.h"
 #include "native_client/src/public/irt_core.h"
 #include "native_client/src/public/nonsfi/elf_loader.h"
 
 int main(int argc, char** argv, char** environ) {
   nacl_irt_nonsfi_allow_dev_interfaces();
   if (argc < 2) {
     std::cerr << "Usage: " << argv[0] <<  " <executable> <args...>\n";
     return 1;
   }
   const char* nexe_filename = argv[1];
   int fd = open(nexe_filename, O_RDONLY);
   if (fd < 0) {
     std::cerr << "Failed to open " << nexe_filename << ": " <<
               strerror(errno) << "\n";
     return 1;
   }
   uintptr_t entry = NaClLoadElfFile(fd);
 
-  mojo::embedder::Init(scoped_ptr<mojo::embedder::PlatformSupport>(
-            new mojo::embedder::SimplePlatformSupport()));
+  // TODO(vtl): Use make_unique when C++14 is available.
+  mojo::embedder::Init(std::unique_ptr<mojo::embedder::PlatformSupport>(
+      new mojo::embedder::SimplePlatformSupport()));
 
   return nacl_irt_nonsfi_entry(argc - 1, argv + 1, environ,
                                reinterpret_cast<nacl_entry_func_t>(entry),
                                nacl::MojoIrtNonsfiQuery);
 }