Pepper: Move GetSandboxISA() to PPB_NaCl_Private.

components/nacl/renderer/nexe_arch.h

+// Copyright (c) 2012 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 CONTENT_NACL_RENDERER_NEXE_ARCH_H
+#define CONTENT_NACL_RENDERER_NEXE_ARCH_H
+
+namespace nacl {
+// Returns the kind of SFI sandbox implemented by sel_ldr on this
+// platform.  See the implementations in arch_*/sandbox_isa.cc for possible
+// values.
+//
+// This is a function of the current CPU, and OS.
+// It is not sufficient to derive the result only from build-time parameters
+// since, for example, an x86-32 plugin is capable of launching a 64-bit NaCl
+// sandbox if a 64-bit sel_ldr is installed (and indeed, may only be capable of
+// launching a 64-bit sandbox).
+const char* GetSandboxISA();
+}  // namespace nacl
+
+#endif  // CONTENT_NACL_RENDERER_NEXE_ARCH_H