PlatformThreadHandle: remove public id() interface

base/threading/platform_thread_mac.mm

 // Copyright (c) 2012 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.
 
 #include "base/threading/platform_thread.h"
 
 #import <Foundation/Foundation.h>
 #include <mach/mach.h>
 #include <mach/mach_time.h>
 #include <mach/thread_policy.h>
@@ skipping 140 matching lines @@
 
   return;
 }
 
 }  // anonymous namespace
 
 // static
 void PlatformThread::SetCurrentThreadPriority(ThreadPriority priority) {
   // Convert from pthread_t to mach thread identifier.
   mach_port_t mach_thread_id =
-      pthread_mach_thread_np(PlatformThread::CurrentHandle().platform_handle());
+      pthread_mach_thread_np(PlatformThread::CurrentHandle().handle_);
 
   switch (priority) {
     case ThreadPriority::NORMAL:
       SetPriorityNormal(mach_thread_id);
       break;
     case ThreadPriority::REALTIME_AUDIO:
       SetPriorityRealtimeAudio(mach_thread_id);
       break;
     default:
       NOTREACHED() << "Unknown priority.";
@@ skipping 42 matching lines @@
 #endif
 }
 
 void InitOnThread() {
 }
 
 void TerminateOnThread() {
 }
 
 }  // namespace base