Use task_t, thread_t, and exception_handler_t uniformly

util/mach/task_memory.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,
@@ skipping 70 matching lines @@
     size_t user_size_;
 
     // The outer class needs to be able to call this class’ private constructor.
     friend class TaskMemory;
 
     DISALLOW_COPY_AND_ASSIGN(MappedMemory);
   };
 
   //! \param[in] task A send right to the target task’s task port. This object
   //!     does not take ownership of the send right.
-  explicit TaskMemory(mach_port_t task);
+  explicit TaskMemory(task_t task);
 
   ~TaskMemory() {}
 
   //! \brief Copies memory from the target task into a caller-provided buffer in
   //!     the current task.
   //!
   //! \param[in] address The address, in the target task’s address space, of the
   //!     memory region to copy.
   //! \param[in] size The size, in bytes, of the memory region to copy. \a
   //!     buffer must be at least this size.
@@ skipping 58 matching lines @@
                               mach_vm_size_t size,
                               std::string* string);
 
  private:
   // The common internal implementation shared by the ReadCString*() methods.
   bool ReadCStringInternal(mach_vm_address_t address,
                            bool has_size,
                            mach_vm_size_t size,
                            std::string* string);
 
-  mach_port_t task_;  // weak
+  task_t task_;  // weak
 
   DISALLOW_COPY_AND_ASSIGN(TaskMemory);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_MACH_TASK_MEMORY_H_