Revert of Properly report number of quality downscales in stats.

webrtc/video_frame.h

Index: webrtc/video_frame.h
diff --git a/webrtc/video_frame.h b/webrtc/video_frame.h
index 4c703074db909cee188e7a16edc8c82b81bb41cd..a834f83ddf1333c74e3f3f70779e905248aceec2 100644
--- a/webrtc/video_frame.h
+++ b/webrtc/video_frame.h
@@ -149,10 +149,14 @@
   EncodedImage(uint8_t* buffer, size_t length, size_t size)
       : _buffer(buffer), _length(length), _size(size) {}
 
-  // TODO(kthelgason): get rid of this struct as it only has a single member
-  // remaining.
   struct AdaptReason {
-    AdaptReason() : bw_resolutions_disabled(-1) {}
+    AdaptReason()
+        : quality_resolution_downscales(-1),
+          bw_resolutions_disabled(-1) {}
+
+    int quality_resolution_downscales;  // Number of times this frame is down
+                                        // scaled in resolution due to quality.
+                                        // Or -1 if information is not provided.
     int bw_resolutions_disabled;  // Number of resolutions that are not sent
                                   // due to bandwidth for this frame.
                                   // Or -1 if information is not provided.