Expose new video codec factories in the PeerConnectionFactory API

media/engine/webrtcmediaengine.h

Index: media/engine/webrtcmediaengine.h
diff --git a/media/engine/webrtcmediaengine.h b/media/engine/webrtcmediaengine.h
index f24f7c7c9fe8ac7ace47a395f7ac69ed2e20f92f..b9713e985be61c08696e10a10b8c9e5c254a3498 100644
--- a/media/engine/webrtcmediaengine.h
+++ b/media/engine/webrtcmediaengine.h
@@ -22,6 +22,8 @@ class AudioDecoderFactory;
 class AudioDeviceModule;
 class AudioMixer;
 class AudioProcessing;
+class VideoDecoderFactory;
+class VideoEncoderFactory;
 }
 namespace cricket {
 class WebRtcVideoDecoderFactory;
@@ -81,6 +83,18 @@ class WebRtcMediaEngineFactory {
       WebRtcVideoDecoderFactory* video_decoder_factory,
       rtc::scoped_refptr<webrtc::AudioMixer> audio_mixer,
       rtc::scoped_refptr<webrtc::AudioProcessing> apm);
+
+  // Create a MediaEngineInterface with optional video codec factories. These
+  // video factories represents all video codecs, i.e. no extra internal video
+  // codecs will be added.
+  static std::unique_ptr<MediaEngineInterface> Create(
+      rtc::scoped_refptr<webrtc::AudioDeviceModule> adm,
+      rtc::scoped_refptr<webrtc::AudioEncoderFactory> audio_encoder_factory,
+      rtc::scoped_refptr<webrtc::AudioDecoderFactory> audio_decoder_factory,
+      std::unique_ptr<webrtc::VideoEncoderFactory> video_encoder_factory,
+      std::unique_ptr<webrtc::VideoDecoderFactory> video_decoder_factory,
+      rtc::scoped_refptr<webrtc::AudioMixer> audio_mixer,
+      rtc::scoped_refptr<webrtc::AudioProcessing> audio_processing);
 };
 
 // Verify that extension IDs are within 1-byte extension range and are not