Expose Ivf logging through the native API

webrtc/video_receive_stream.h

Index: webrtc/video_receive_stream.h
diff --git a/webrtc/video_receive_stream.h b/webrtc/video_receive_stream.h
index 0adcf3fc0d4cd3f499ae562dbd91ffbcfb03a21b..24b78174d862da071e786de521c4a3e83103831b 100644
--- a/webrtc/video_receive_stream.h
+++ b/webrtc/video_receive_stream.h
@@ -16,6 +16,7 @@
 #include <string>
 #include <vector>
 
+#include "webrtc/base/platform_file.h"
 #include "webrtc/common_types.h"
 #include "webrtc/common_video/include/frame_callback.h"
 #include "webrtc/config.h"
@@ -208,6 +209,12 @@ class VideoReceiveStream {
   // TODO(pbos): Add info on currently-received codec to Stats.
   virtual Stats GetStats() const = 0;
 
+  // Takes ownership of the file, is responsible for closing it later.
+  // Calling this method will close and finalize any current log.
+  // Giving rtc::kInvalidPlatformFileValue disables logging.
+  virtual void SetLogFile(
+      rtc::PlatformFile file = rtc::kInvalidPlatformFileValue) = 0;
+
  protected:
   virtual ~VideoReceiveStream() {}
 };