Work-in-progress upload to add worker task queue to PC factory.

webrtc/media/engine/webrtcmediaengine.h

Index: webrtc/media/engine/webrtcmediaengine.h
diff --git a/webrtc/media/engine/webrtcmediaengine.h b/webrtc/media/engine/webrtcmediaengine.h
index 1fc988d1f45299b430526b05431b9ecdf48569f4..f5dd1064b653a207ae65fe3f46ee0007e3d5a590 100644
--- a/webrtc/media/engine/webrtcmediaengine.h
+++ b/webrtc/media/engine/webrtcmediaengine.h
@@ -18,6 +18,10 @@
 #include "webrtc/config.h"
 #include "webrtc/media/base/mediaengine.h"
 
+namespace rtc {
+class TaskQueue;
+}
+
 namespace webrtc {
 class AudioDecoderFactory;
 class AudioDeviceModule;
@@ -75,6 +79,17 @@ class WebRtcMediaEngineFactory {
       WebRtcVideoEncoderFactory* video_encoder_factory,
       WebRtcVideoDecoderFactory* video_decoder_factory,
       rtc::scoped_refptr<webrtc::AudioMixer> audio_mixer);
+
+  static MediaEngineInterface* Create(
+      webrtc::AudioDeviceModule* adm,
+      const rtc::scoped_refptr<webrtc::AudioEncoderFactory>&
+          audio_encoder_factory,
+      const rtc::scoped_refptr<webrtc::AudioDecoderFactory>&
+          audio_decoder_factory,
+      WebRtcVideoEncoderFactory* video_encoder_factory,
+      WebRtcVideoDecoderFactory* video_decoder_factory,
+      rtc::scoped_refptr<webrtc::AudioMixer> audio_mixer,
+      rtc::TaskQueue* low_priority_worker_queue);
 };
 
 // Verify that extension IDs are within 1-byte extension range and are not