Add ConstThreadState to mach_extensions.h and use it everywhere

snapshot/mac/mach_o_image_annotations_reader_test.cc

 // 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,
@@ skipping 19 matching lines @@
 #include "client/simple_string_dictionary.h"
 #include "gtest/gtest.h"
 #include "snapshot/mac/process_reader.h"
 #include "test/errors.h"
 #include "test/mac/mach_errors.h"
 #include "test/mac/mach_multiprocess.h"
 #include "util/file/file_io.h"
 #include "util/mac/mac_util.h"
 #include "util/mach/exc_server_variants.h"
 #include "util/mach/exception_ports.h"
+#include "util/mach/mach_extensions.h"
 #include "util/mach/mach_message.h"
 #include "util/mach/mach_message_server.h"
 
 namespace crashpad {
 namespace test {
 namespace {
 
 class TestMachOImageAnnotationsReader final
     : public MachMultiprocess,
       public UniversalMachExcServer::Interface {
@@ skipping 22 matching lines @@
 
   // UniversalMachExcServer::Interface:
   kern_return_t CatchMachException(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,
                                    const mach_msg_trailer_t* trailer,
                                    bool* destroy_complex_request) override {
     *destroy_complex_request = true;
 
     EXPECT_EQ(ChildTask(), task);
 
     ProcessReader process_reader;
@@ skipping 241 matching lines @@
 
 TEST(MachOImageAnnotationsReader, CrashDyld) {
   TestMachOImageAnnotationsReader test_mach_o_image_annotations_reader(
       TestMachOImageAnnotationsReader::kCrashDyld);
   test_mach_o_image_annotations_reader.Run();
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace crashpad