Adding "adapter" ORTC objects on top of ChannelManager/BaseChannel/etc.

webrtc/api/peerconnectioninterface.h

Index: webrtc/api/peerconnectioninterface.h
diff --git a/webrtc/api/peerconnectioninterface.h b/webrtc/api/peerconnectioninterface.h
index 07c5ec2386a54f936e80e29fa486f162c511d8f1..22214efd32f8093ae398d1d1cbee9021cb442d39 100644
--- a/webrtc/api/peerconnectioninterface.h
+++ b/webrtc/api/peerconnectioninterface.h
@@ -68,7 +68,6 @@
 #define WEBRTC_API_PEERCONNECTIONINTERFACE_H_
 
 #include <memory>
-#include <ostream>
 #include <string>
 #include <utility>
 #include <vector>
@@ -901,7 +900,7 @@ class PeerConnectionFactoryInterface : public rtc::RefCountInterface {
   virtual rtc::scoped_refptr<MediaStreamInterface>
       CreateLocalMediaStream(const std::string& label) = 0;
 
-  // Creates a AudioSourceInterface.
+  // Creates an AudioSourceInterface.
   // |options| decides audio processing settings.
   virtual rtc::scoped_refptr<AudioSourceInterface> CreateAudioSource(
       const cricket::AudioOptions& options) = 0;