Add ConstThreadState to mach_extensions.h and use it everywhere

util/mach/exc_client_variants.h

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #ifndef CRASHPAD_UTIL_MACH_EXC_CLIENT_VARIANTS_H_
 #define CRASHPAD_UTIL_MACH_EXC_CLIENT_VARIANTS_H_
 
 #include <mach/mach.h>
 
+#include "util/mach/mach_extensions.h"
+
 namespace crashpad {
 
 //! \brief Calls the appropriate `*exception_raise*()` function for the
 //!     specified \a behavior.
 //!
 //! The function called will be `exception_raise()` for `EXCEPTION_DEFAULT`,
 //! `exception_raise_state()` for `EXCEPTION_STATE`, or
 //! `exception_raise_state_identity()` for `EXCEPTION_STATE_IDENTITY`. If
 //! `MACH_EXCEPTION_CODES` is also set, the function called will instead be
 //! `mach_exception_raise()`, `mach_exception_raise_state()` or
@@ skipping 36 matching lines @@
 //!
 //! \return The return value of the function called.
 kern_return_t UniversalExceptionRaise(exception_behavior_t behavior,
                                       exception_handler_t exception_port,
                                       thread_t thread,
                                       task_t task,
                                       exception_type_t exception,
                                       const mach_exception_data_type_t* code,
                                       mach_msg_type_number_t code_count,
                                       thread_state_flavor_t* flavor,
-                                      const natural_t* old_state,
+                                      ConstThreadState old_state,
                                       mach_msg_type_number_t old_state_count,
                                       thread_state_t new_state,
                                       mach_msg_type_number_t* new_state_count);
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_MACH_EXC_CLIENT_VARIANTS_H_