Added simplest device mount implementation (includes NullDevice and RandomDevice)

libraries/nacl-mounts/dev/NullDevice.h

Index: libraries/nacl-mounts/dev/NullDevice.h
===================================================================
--- libraries/nacl-mounts/dev/NullDevice.h	(revision 0)
+++ libraries/nacl-mounts/dev/NullDevice.h	(revision 0)
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2012 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef PACKAGES_LIBRARIES_NACL_MOUNTS_DEV_NULLDEVICE_H_
+#define PACKAGES_LIBRARIES_NACL_MOUNTS_DEV_NULLDEVICE_H_
+
+#include "../dev/Device.h"
+
+// NullDevice
+class NullDevice : public Device {
+ public:
+  NullDevice() {}
+  ~NullDevice() {}
+  int GetInode() { return 1 };

[Evgeniy Stepanov, 2012/05/11 08:16:37]

No magic constants please. Either assign them in DevMount::Attach, or list them
in one header so it's easy to see that we don't assign the same inode number to
different devices by mistake.

[vissi, 2012/05/11 08:31:05]

Done.

+ private:
+
+  DISALLOW_COPY_AND_ASSIGN(NullDevice);
+}
+
+#endif
+