mac: Remove some 10.6-SDK-only sandbox code.

sandbox/mac/xpc_stubs_header.fragment

-// Copyright 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.
-
-#ifndef SANDBOX_MAC_XPC_STUBS_HEADER_FRAGMENT_
-#define SANDBOX_MAC_XPC_STUBS_HEADER_FRAGMENT_
-
-#include <bsm/libbsm.h>
-#include <stddef.h>
-#include <stdint.h>
-
-#include "sandbox/sandbox_export.h"
-
-// Declare or include public types.
-#if !defined(MAC_OS_X_VERSION_10_7) || \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
-
-extern "C" {
-typedef void* xpc_object_t;
-}  // extern "C"
-
-#else
-
-#include <xpc/xpc.h>
-
-#endif
-
-// Declare private types.
-extern "C" {
-typedef struct _xpc_pipe_s* xpc_pipe_t;
-}  // extern "C"
-
-#if defined(MAC_OS_X_VERSION_10_7) && \
-    MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_7
-// Redeclare methods that only exist on 10.7+ to suppress
-// -Wpartial-availability warnings.
-extern "C" {
-XPC_EXPORT XPC_NONNULL1 XPC_NONNULL2 void
-xpc_dictionary_set_int64(xpc_object_t xdict, const char* key, int64_t value);
-
-XPC_EXPORT XPC_NONNULL1 void xpc_release(xpc_object_t object);
-
-XPC_EXPORT XPC_WARN_RESULT XPC_NONNULL_ALL
-bool xpc_dictionary_get_bool(xpc_object_t xdict, const char* key);
-
-XPC_EXPORT XPC_WARN_RESULT XPC_NONNULL_ALL int64_t
-xpc_dictionary_get_int64(xpc_object_t xdict, const char* key);
-
-XPC_EXPORT XPC_WARN_RESULT XPC_NONNULL_ALL
-const char* xpc_dictionary_get_string(xpc_object_t xdict, const char* key);
-
-XPC_EXPORT XPC_WARN_RESULT XPC_NONNULL_ALL uint64_t
-xpc_dictionary_get_uint64(xpc_object_t xdict, const char* key);
-
-XPC_EXPORT XPC_NONNULL1 XPC_NONNULL2 void
-xpc_dictionary_set_uint64(xpc_object_t xdict, const char* key, uint64_t value);
-
-XPC_EXPORT XPC_NONNULL1 XPC_NONNULL2
-void xpc_dictionary_set_string(xpc_object_t xdict, const char* key,
-                               const char* string);
-
-XPC_EXPORT XPC_MALLOC XPC_RETURNS_RETAINED XPC_WARN_RESULT xpc_object_t
-xpc_dictionary_create(const char* const* keys,
-                      const xpc_object_t* values,
-                      size_t count);
-XPC_EXPORT XPC_MALLOC XPC_RETURNS_RETAINED XPC_WARN_RESULT XPC_NONNULL_ALL
-    xpc_object_t
-    xpc_dictionary_create_reply(xpc_object_t original);
-
-XPC_EXPORT XPC_WARN_RESULT XPC_NONNULL1 XPC_NONNULL2
-xpc_object_t xpc_dictionary_get_value(xpc_object_t xdict, const char* key);
-
-XPC_EXPORT XPC_MALLOC XPC_WARN_RESULT XPC_NONNULL1
-char* xpc_copy_description(xpc_object_t object);
-}  // extern "C"
-#endif
-
-#endif  // SANDBOX_MAC_XPC_STUBS_HEADER_FRAGMENT_