Support for AudioContextOptions latencyHint.

third_party/WebKit/Source/modules/webaudio/OfflineAudioDestinationNode.h

 /*
  * 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 45 matching lines @@
 
   // AudioDestinationHandler
   void startRendering() override;
   void stopRendering() override;
   unsigned long maxChannelCount() const override;
 
   // Returns the rendering callback buffer size.  This should never be
   // called.
   size_t callbackBufferSize() const override;
 
-  float sampleRate() const override { return m_renderTarget->sampleRate(); }
+  double sampleRate() const override { return m_renderTarget->sampleRate(); }
+  int framesPerBuffer() const override {
+    NOTREACHED();
+    return 0;
+  }
 
   size_t renderQuantumFrames() const {
     return AudioUtilities::kRenderQuantumFrames;
   }
 
   WebThread* offlineRenderThread();
 
  private:
   OfflineAudioDestinationHandler(AudioNode&, AudioBuffer* renderTarget);
 
@@ skipping 52 matching lines @@
   static OfflineAudioDestinationNode* create(BaseAudioContext*,
                                              AudioBuffer* renderTarget);
 
  private:
   OfflineAudioDestinationNode(BaseAudioContext&, AudioBuffer* renderTarget);
 };
 
 }  // namespace blink
 
 #endif  // OfflineAudioDestinationNode_h