Use task_t, thread_t, and exception_handler_t uniformly

util/test/mac/mach_multiprocess.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 97 matching lines @@
 mach_port_t MachMultiprocess::LocalPort() const {
   EXPECT_NE(kMachPortNull, info_->local_port);
   return info_->local_port;
 }
 
 mach_port_t MachMultiprocess::RemotePort() const {
   EXPECT_NE(kMachPortNull, info_->remote_port);
   return info_->remote_port;
 }
 
-mach_port_t MachMultiprocess::ChildTask() const {
+task_t MachMultiprocess::ChildTask() const {
   EXPECT_NE(kMachPortNull, info_->child_task);
   return info_->child_task;
 }
 
 void MachMultiprocess::MultiprocessParent() {
   ReceiveHelloMessage message = {};
 
   kern_return_t kr =
       mach_msg(&message.header,
                MACH_RCV_MSG | MACH_RCV_TRAILER_TYPE(MACH_MSG_TRAILER_FORMAT_0) |
@@ skipping 135 matching lines @@
   if (Test::HasFailure()) {
     // Trigger the ScopedForbidReturn destructor.
     return;
   }
 
   forbid_return.Disarm();
 }
 
 }  // namespace test
 }  // namespace crashpad