Throw error if timeConstant is not positive for setTargetAtTime

third_party/WebKit/Source/modules/webaudio/AudioParamTimeline.cpp

 /*
  * Copyright (C) 2011 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 161 matching lines @@
     }
 
     insertEvent(ParamEvent::createExponentialRampEvent(value, time), exceptionState);
 }
 
 void AudioParamTimeline::setTargetAtTime(float target, double time, double timeConstant, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
 
     if (!isNonNegativeAudioParamTime(time, exceptionState)
-        || !isNonNegativeAudioParamTime(timeConstant, exceptionState, "Time constant"))
+        || !isPositiveAudioParamTime(timeConstant, exceptionState, "Time constant"))
         return;
 
     insertEvent(ParamEvent::createSetTargetEvent(target, time, timeConstant), exceptionState);
 }
 
 void AudioParamTimeline::setValueCurveAtTime(DOMFloat32Array* curve, double time, double duration, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     ASSERT(curve);
 
@@ skipping 613 matching lines @@
     for (; writeIndex < numberOfValues; ++writeIndex)
         values[writeIndex] = value;
 
     // This value is used to set the .value attribute of the AudioParam.  it should be the last
     // computed value.
     return values[numberOfValues - 1];
 }
 
 } // namespace blink