Use frames instead of time for running AudioParam timelines.

third_party/WebKit/Source/modules/webaudio/AudioParam.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 143 matching lines @@
         // Sum, with unity-gain.
         summingBus->sumFrom(*connectionBus);
     }
 }
 
 void AudioParamHandler::calculateTimelineValues(float* values, unsigned numberOfValues)
 {
     // Calculate values for this render quantum.  Normally numberOfValues will
     // equal to AudioHandler::ProcessingSizeInFrames (the render quantum size).
     double sampleRate = context()->sampleRate();
-    double startTime = context()->currentTime();
-    double endTime = startTime + numberOfValues / sampleRate;
+    size_t startFrame = context()->currentSampleFrame();
+    size_t endFrame = startFrame + numberOfValues;
 
     // Note we're running control rate at the sample-rate.
     // Pass in the current value as default value.
-    m_value = m_timeline.valuesForTimeRange(startTime, endTime, narrowPrecisionToFloat(m_value), values, numberOfValues, sampleRate, sampleRate);
+    m_value = m_timeline.valuesForFrameRange(startFrame, endFrame, narrowPrecisionToFloat(m_value), values, numberOfValues, sampleRate, sampleRate);
 }
 
 void AudioParamHandler::connect(AudioNodeOutput& output)
 {
     ASSERT(deferredTaskHandler().isGraphOwner());
 
     if (m_outputs.contains(&output))
         return;
 
     output.addParam(*this);
@@ skipping 71 matching lines @@
 }
 
 void AudioParam::cancelScheduledValues(double startTime, ExceptionState& exceptionState)
 {
     handler().timeline().cancelScheduledValues(startTime, exceptionState);
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)