Add a "native_support" service.

services/native_support/process_io_redirection.cc

Index: services/native_support/process_io_redirection.cc
diff --git a/services/native_support/process_io_redirection.cc b/services/native_support/process_io_redirection.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d56514986307513a9825e6388aa5b437dfb0843f
--- /dev/null
+++ b/services/native_support/process_io_redirection.cc
@@ -0,0 +1,56 @@
+// 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 "services/native_support/process_io_redirection.h"
+
+#include "base/logging.h"
+
+namespace native_support {
+
+ProcessIORedirectionForStdIO::ProcessIORedirectionForStdIO(
+    mojo::files::FilePtr stdin_file,
+    mojo::files::FilePtr stdout_file,
+    mojo::files::FilePtr stderr_file,
+    base::ScopedFD stdin_fd,
+    base::ScopedFD stdout_fd,
+    base::ScopedFD stderr_fd)
+    : stdin_file_(stdin_file.Pass()),
+      stdout_file_(stdout_file.Pass()),
+      stderr_file_(stderr_file.Pass()),
+      stdin_fd_(stdin_fd.Pass()),
+      stdout_fd_(stdout_fd.Pass()),
+      stderr_fd_(stderr_fd.Pass()) {
+  if (stdin_file_) {
+    stdin_redirector_.reset(
+        new MojoFileToFDRedirector(stdin_file_.get(), stdin_fd_.get(), 4096));
+    stdin_redirector_->Start();
+  }
+  if (stdout_file_) {
+    stdout_redirector_.reset(
+        new FDToMojoFileRedirector(stdout_fd_.get(), stdout_file_.get(), 4096));
+    stdout_redirector_->Start();
+  }
+  if (stderr_file_) {
+    stderr_redirector_.reset(
+        new FDToMojoFileRedirector(stderr_fd_.get(), stderr_file_.get(), 4096));
+    stderr_redirector_->Start();
+  }
+}
+
+ProcessIORedirectionForStdIO::~ProcessIORedirectionForStdIO() {}
+
+ProcessIORedirectionForTerminal::ProcessIORedirectionForTerminal(
+    mojo::files::FilePtr terminal_file,
+    base::ScopedFD terminal_fd)
+    : terminal_file_(terminal_file.Pass()),
+      terminal_fd_(terminal_fd.Pass()),
+      input_redirector_(terminal_file_.get(), terminal_fd_.get(), 4096),
+      output_redirector_(terminal_fd_.get(), terminal_file_.get(), 4096) {
+  input_redirector_.Start();
+  output_redirector_.Start();
+}
+
+ProcessIORedirectionForTerminal::~ProcessIORedirectionForTerminal() {}
+
+}  // namespace native_support