Implementation of Platform class that exposes information about the machine and the OS.

runtime/bin/platform_macos.cc

Index: runtime/bin/platform_macos.cc
diff --git a/runtime/bin/platform_macos.cc b/runtime/bin/platform_macos.cc
new file mode 100644
index 0000000000000000000000000000000000000000..aee6f89200291c56e4971b66b03f0c06372805c7
--- /dev/null
+++ b/runtime/bin/platform_macos.cc
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+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "bin/platform.h"
+
+#include <unistd.h>
+
+
+int Platform::NumberOfProcessors() {
+  return sysconf(_SC_NPROCESSORS_ONLN);
+}
+
+
+const char* Platform::OperatingSystem() {
+  return "macos";
+}