Removing unused members in DefaultAudioDestinationNode

This CL removes unused 'input'-related members from
DefaultAudioDestinationNode.

Bug: 854229
Change-Id: I8495ac736d4cb1f33c61fec243510c42a88e3fc2
Reviewed-on: https://chromium-review.googlesource.com/1110035
Commit-Queue: Hongchan Choi <hongchan@chromium.org>
Reviewed-by: Raymond Toy <rtoy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569319}

third_party/blink/renderer/modules/webaudio/default_audio_destination_node.cc

@@ -37,7 +37,6 @@ DefaultAudioDestinationHandler::DefaultAudioDestinationHandler(
     AudioNode& node,
     const WebAudioLatencyHint& latency_hint)
     : AudioDestinationHandler(node),
-      number_of_input_channels_(0),
       latency_hint_(latency_hint) {
   // Node-specific default mixing rules.
   channel_count_ = 2;
@@ -78,7 +77,6 @@ void DefaultAudioDestinationHandler::Uninitialize() {
   if (destination_->IsPlaying())
     StopDestination();
 
-  number_of_input_channels_ = 0;
   AudioHandler::Uninitialize();
 }
 

third_party/blink/renderer/modules/webaudio/default_audio_destination_node.h

@@ -79,8 +79,6 @@ class DefaultAudioDestinationHandler final : public AudioDestinationHandler {
   // tasks are completed.
   scoped_refptr<AudioDestination> destination_;
 
-  String input_device_id_;
-  unsigned number_of_input_channels_;
   const WebAudioLatencyHint latency_hint_;
 };