Check buffer index in shared memory for input audio.

content/browser/renderer_host/media/audio_input_sync_writer.h

Index: content/browser/renderer_host/media/audio_input_sync_writer.h
diff --git a/content/browser/renderer_host/media/audio_input_sync_writer.h b/content/browser/renderer_host/media/audio_input_sync_writer.h
index 1ace401441faec0bff55226b875064876ae94216..cc6c0f248e5e7568681b19ca35a4eb51bc4fdb89 100644
--- a/content/browser/renderer_host/media/audio_input_sync_writer.h
+++ b/content/browser/renderer_host/media/audio_input_sync_writer.h
@@ -35,10 +35,10 @@ class AudioInputSyncWriter : public media::AudioInputController::SyncWriter {
   ~AudioInputSyncWriter() override;
 
   // media::AudioInputController::SyncWriter implementation.
-  void UpdateRecordedBytes(uint32 bytes) override;
   void Write(const media::AudioBus* data,
              double volume,
-             bool key_pressed) override;
+             bool key_pressed,
+             uint32 hardware_delay_bytes) override;
   void Close() override;
 
   bool Init();
@@ -67,6 +67,9 @@ class AudioInputSyncWriter : public media::AudioInputController::SyncWriter {
   // Size in bytes of each audio bus.
   const int audio_bus_memory_size_;
 
+  // Increasing ID used for audio buffers correct sequence at read side.
+  uint32_t next_buffer_id_;
+
   // Vector of audio buses allocated during construction and deleted in the
   // destructor.
   ScopedVector<media::AudioBus> audio_buses_;