Support for AudioContextOptions latencyHint.

content/renderer/media/renderer_webaudiodevice_impl.h

Index: content/renderer/media/renderer_webaudiodevice_impl.h
diff --git a/content/renderer/media/renderer_webaudiodevice_impl.h b/content/renderer/media/renderer_webaudiodevice_impl.h
index a761e4294ee437024a979d1b6111b3e71b0b7cc6..d90b6a0890255e7655f418d1b106c0719317b5ba 100644
--- a/content/renderer/media/renderer_webaudiodevice_impl.h
+++ b/content/renderer/media/renderer_webaudiodevice_impl.h
@@ -10,6 +10,7 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_checker.h"
+#include "content/renderer/media/audio_device_factory.h"
 #include "media/base/audio_parameters.h"
 #include "media/base/audio_renderer_sink.h"
 #include "third_party/WebKit/public/platform/WebAudioDevice.h"
@@ -26,6 +27,7 @@ class RendererWebAudioDeviceImpl
       public media::AudioRendererSink::RenderCallback {
  public:
   RendererWebAudioDeviceImpl(const media::AudioParameters& params,
+                             const AudioDeviceFactory::SourceType source_type,
                              blink::WebAudioDevice::RenderCallback* callback,
                              int session_id,
                              const url::Origin& security_origin);
@@ -35,6 +37,7 @@ class RendererWebAudioDeviceImpl
   void start() override;
   void stop() override;
   double sampleRate() override;
+  int framesPerBuffer() override;
 
   // AudioRendererSink::RenderCallback implementation.
   int Render(media::AudioBus* dest,
@@ -44,7 +47,9 @@ class RendererWebAudioDeviceImpl
   void OnRenderError() override;
 
  private:
-  const media::AudioParameters params_;
+  const media::AudioParameters sink_params_;
+
+  const AudioDeviceFactory::SourceType source_type_;
 
   // Weak reference to the callback into WebKit code.
   blink::WebAudioDevice::RenderCallback* const client_callback_;