Added video_coding::EncodedFrame copy ctor.

Bug: none
Change-Id: I45272e81509741dc022d613758466ad0f8de7a31
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/143160
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28333}
diff --git a/modules/video_coding/encoded_frame.h b/modules/video_coding/encoded_frame.h
index f8ee6a7..75b4b5b 100644
--- a/modules/video_coding/encoded_frame.h
+++ b/modules/video_coding/encoded_frame.h
@@ -23,7 +23,7 @@
 class VCMEncodedFrame : protected EncodedImage {
  public:
   VCMEncodedFrame();
-  VCMEncodedFrame(const VCMEncodedFrame&) = delete;
+  VCMEncodedFrame(const VCMEncodedFrame&);
 
   ~VCMEncodedFrame();
   /**