Pepper: Move GetSandboxISA() to PPB_NaCl_Private.

components/nacl/renderer/sandbox_arch.h

Index: components/nacl/renderer/sandbox_arch.h
diff --git a/components/nacl/renderer/sandbox_arch.h b/components/nacl/renderer/sandbox_arch.h
new file mode 100644
index 0000000000000000000000000000000000000000..d30324cc6639c918e534ee9b40f5b78a80e05d6e
--- /dev/null
+++ b/components/nacl/renderer/sandbox_arch.h
@@ -0,0 +1,18 @@
+// Copyright (c) 2014 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.
+
+// Routines for determining the most appropriate NaCl executable for
+// the current CPU's architecture.
+
+#ifndef COMPONENTS_NACL_RENDERER_SANDBOX_ARCH_H
+#define COMPONENTS_NACL_RENDERER_SANDBOX_ARCH_H
+
+namespace nacl {
+// Returns the kind of SFI sandbox implemented by NaCl on this
+// platform.  See the implementation in sandbox_arch.cc for possible
+// values.
+const char* GetSandboxArch();
+}  // namespace nacl
+
+#endif  // COMPONENTS_NACL_RENDERER_SANDBOX_ARCH_H