Adds the necessary changes to tpm_init to allow triggered initialization.

platform.h

+// Copyright (c) 2009-2010 The Chromium OS 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 TPM_INIT_PLATFORM_H_
+#define TPM_INIT_PLATFORM_H_
+
+#include <base/basictypes.h>
+#include <string>
+#include <vector>
+
+namespace tpm_init {
+
+// Default umask
+extern const int kDefaultUmask;
+
+// Class Platform exists to be able to mock platform calls (in this case, just
+// umask).
+// TODO(fes): Remove this class altogether if tpm_init is merged with
+// cryptohome, or put it in a separate, common library.
+class Platform {
+ public:
+
+  Platform();
+
+  virtual ~Platform();
+
+  // Sets the current umask, returning the old mask
+  //
+  // Parameters
+  //   new_mask - The mask to set
+  virtual int SetMask(int new_mask);
+
+ private:
+  int umask_;
+
+  DISALLOW_COPY_AND_ASSIGN(Platform);
+};
+
+}  // namespace tpm_init
+
+#endif  // TPM_INIT_PLATFORM_H_