Implement tail processing for AudioNodes

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <memory>
 #include "core/testing/DummyPageHolder.h"
 #include "modules/webaudio/AudioBasicProcessorHandler.h"
 #include "modules/webaudio/OfflineAudioContext.h"
 #include "platform/audio/AudioProcessor.h"
 #include "platform/wtf/PtrUtil.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 class MockAudioProcessor final : public AudioProcessor {
  public:
   MockAudioProcessor() : AudioProcessor(48000, 2) {}
   void Initialize() override { initialized_ = true; }
   void Uninitialize() override { initialized_ = false; }
   void Process(const AudioBus*, AudioBus*, size_t) override {}
   void Reset() override {}
   void SetNumberOfChannels(unsigned) override {}
   unsigned NumberOfChannels() const override { return number_of_channels_; }
+  bool RequiresTailProcessing() const override { return true; }
   double TailTime() const override { return 0; }
   double LatencyTime() const override { return 0; }
 };
 
 class MockProcessorNode final : public AudioNode {
  public:
   MockProcessorNode(BaseAudioContext& context) : AudioNode(context) {
     SetHandler(AudioBasicProcessorHandler::Create(
         AudioHandler::kNodeTypeWaveShaper, *this, 48000,
         WTF::MakeUnique<MockAudioProcessor>()));
@@ skipping 12 matching lines @@
   EXPECT_TRUE(handler.Processor()->IsInitialized());
   BaseAudioContext::AutoLocker locker(context);
   handler.Dispose();
   // The AudioProcessor should live after dispose() and should not be
   // finalized because an audio thread is using it.
   EXPECT_TRUE(handler.Processor());
   EXPECT_TRUE(handler.Processor()->IsInitialized());
 }
 
 }  // namespace blink