Use TaskScheduler instead of WorkerPool in BackgroundTaskRunner.cpp

third_party/WebKit/Source/modules/webaudio/AsyncAudioDecoder.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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 20 matching lines @@
 #include "platform/CrossThreadFunctional.h"
 #include "platform/audio/AudioBus.h"
 #include "platform/audio/AudioFileReader.h"
 #include "platform/threading/BackgroundTaskRunner.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebTraceLocation.h"
 #include "wtf/PtrUtil.h"
 
 namespace blink {
 
-// This threshold is determined by the assumption that the target audio
-// file is compressed in AAC or MP3. The decoding time varies upon different
-// audio file encoding types, but it is fair to assume the usage of compressed
-// file.
-static const unsigned kTaskSizeThresholdInByte = 512000;
-
 void AsyncAudioDecoder::decodeAsync(DOMArrayBuffer* audioData,
                                     float sampleRate,
                                     AudioBufferCallback* successCallback,
                                     AudioBufferCallback* errorCallback,
                                     ScriptPromiseResolver* resolver,
                                     BaseAudioContext* context) {
   DCHECK(isMainThread());
   DCHECK(audioData);
   if (!audioData)
     return;
 
-  BackgroundTaskRunner::TaskSize taskSize =
-      audioData->byteLength() < kTaskSizeThresholdInByte
-          ? BackgroundTaskRunner::TaskSizeShortRunningTask
-          : BackgroundTaskRunner::TaskSizeLongRunningTask;
   BackgroundTaskRunner::postOnBackgroundThread(
       BLINK_FROM_HERE,
       crossThreadBind(&AsyncAudioDecoder::decodeOnBackgroundThread,
                       wrapCrossThreadPersistent(audioData), sampleRate,
                       wrapCrossThreadPersistent(successCallback),
                       wrapCrossThreadPersistent(errorCallback),
                       wrapCrossThreadPersistent(resolver),
-                      wrapCrossThreadPersistent(context)),
-      taskSize);
+                      wrapCrossThreadPersistent(context)));
 }
 
 void AsyncAudioDecoder::decodeOnBackgroundThread(
     DOMArrayBuffer* audioData,
     float sampleRate,
     AudioBufferCallback* successCallback,
     AudioBufferCallback* errorCallback,
     ScriptPromiseResolver* resolver,
     BaseAudioContext* context) {
   DCHECK(!isMainThread());
@@ skipping 29 matching lines @@
   AudioBuffer* audioBuffer = AudioBuffer::createFromAudioBus(audioBus);
 
   // If the context is available, let the context finish the notification.
   if (context) {
     context->handleDecodeAudioData(audioBuffer, resolver, successCallback,
                                    errorCallback);
   }
 }
 
 }  // namespace blink