Replace AllowCrossThreadAccess() + non-GCed pointers with crossThreadUnretained()

third_party/WebKit/Source/platform/audio/ReverbConvolver.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 154 matching lines @@
 
     // Accumulate contributions from each stage
     for (size_t i = 0; i < m_stages.size(); ++i)
         m_stages[i]->process(source, framesToProcess);
 
     // Finally read from accumulation buffer
     m_accumulationBuffer.readAndClear(destination, framesToProcess);
 
     // Now that we've buffered more input, post another task to the background thread.
     if (m_backgroundThread)
-        m_backgroundThread->getWebTaskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&ReverbConvolver::processInBackground, AllowCrossThreadAccess(this)));
+        m_backgroundThread->getWebTaskRunner()->postTask(BLINK_FROM_HERE, threadSafeBind(&ReverbConvolver::processInBackground, crossThreadUnretained(this)));
 }
 
 void ReverbConvolver::reset()
 {
     for (size_t i = 0; i < m_stages.size(); ++i)
         m_stages[i]->reset();
 
     for (size_t i = 0; i < m_backgroundStages.size(); ++i)
         m_backgroundStages[i]->reset();
 
     m_accumulationBuffer.reset();
     m_inputBuffer.reset();
 }
 
 size_t ReverbConvolver::latencyFrames() const
 {
     return 0;
 }
 
 } // namespace blink