Change audio render thread checking to use new AudioRendererSink::BelongsToRendererThread()

media/audio/audio_device_thread.cc

 // 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 "media/audio/audio_device_thread.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 212 matching lines @@
       bytes_per_frame_(audio_parameters.GetBytesPerFrame()),
       shared_memory_(memory, false),
       memory_length_(memory_length),
       total_segments_(total_segments) {
   CHECK_NE(bytes_per_ms_, 0.0);  // Catch division by zero early.
   CHECK_NE(samples_per_ms_, 0.0);
   CHECK_NE(bytes_per_frame_, 0u);
   CHECK_GT(total_segments_, 0);
   CHECK_EQ(memory_length_ % total_segments_, 0);
   segment_length_ = memory_length_ / total_segments_;
+  thread_checker_.DetachFromThread();
 }
 
 AudioDeviceThread::Callback::~Callback() {}
 
 void AudioDeviceThread::Callback::InitializeOnAudioThread() {
+  // Normally this function is called before the thread checker is used
+  // elsewhere, but it's not guaranteed. DCHECK to ensure it was not used on
+  // another thread before we get here.
+  DCHECK(thread_checker_.CalledOnValidThread())
+      << "Thread checker was attached on the wrong thread";
   MapSharedMemory();
   CHECK(shared_memory_.memory());
 }
 
 }  // namespace media.