Moves channel-dependent audio input processing to separate encoder task queue

webrtc/modules/audio_device/audio_device_buffer.h

Index: webrtc/modules/audio_device/audio_device_buffer.h
diff --git a/webrtc/modules/audio_device/audio_device_buffer.h b/webrtc/modules/audio_device/audio_device_buffer.h
index 1466e6934b08303fa4920b3bc54d7bbd21c24b12..1bb2ce95714493483f35a45c8379a65369094529 100644
--- a/webrtc/modules/audio_device/audio_device_buffer.h
+++ b/webrtc/modules/audio_device/audio_device_buffer.h
@@ -251,6 +251,11 @@ class AudioDeviceBuffer {
   // Setting this member to false prevents (possiby invalid) log messages from
   // being printed in the LogStats() task.
   bool log_stats_ ACCESS_ON(task_queue_);
+
+  // TODO(henrika): to be removed... (only used for tesing of this CL)!
+  int64_t max_diff_time_ = 0;
+  int64_t num_diff_times_ = 0;
+  int64_t acc_diff_times_ = 0;
 };
 
 }  // namespace webrtc