Handle NaN in the Audio delay curves.

third_party/WebKit/Source/platform/audio/AudioDelayDSPKernel.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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 101 matching lines @@
 
         if (m_firstTime) {
             m_currentDelayTime = delayTime;
             m_firstTime = false;
         }
     }
 
     for (unsigned i = 0; i < framesToProcess; ++i) {
         if (sampleAccurate) {
             delayTime = delayTimes[i];
-            delayTime = clampTo(delayTime, 0.0, maxTime);
+            if (std::isnan(delayTime))
+                delayTime = maxTime;
+            else
+                delayTime = clampTo(delayTime, 0.0, maxTime);
             m_currentDelayTime = delayTime;
         } else {
             // Approach desired delay time.
             m_currentDelayTime += (delayTime - m_currentDelayTime) * m_smoothingRate;
         }
 
         double desiredDelayFrames = m_currentDelayTime * sampleRate;
 
         double readPosition = m_writeIndex + bufferLength - desiredDelayFrames;
         if (readPosition >= bufferLength)
@@ skipping 30 matching lines @@
     return m_maxDelayTime;
 }
 
 double AudioDelayDSPKernel::latencyTime() const
 {
     return 0;
 }
 
 } // namespace blink