Replace const-reference with pointer in SendData.

webrtc/modules/video_coding/include/video_coding_defines.h

Index: webrtc/modules/video_coding/include/video_coding_defines.h
diff --git a/webrtc/modules/video_coding/include/video_coding_defines.h b/webrtc/modules/video_coding/include/video_coding_defines.h
index 673a02b7130114b45ff897e230866636ef984e8d..7d084c815b8f2ea2a92215bfc0a4394210783688 100644
--- a/webrtc/modules/video_coding/include/video_coding_defines.h
+++ b/webrtc/modules/video_coding/include/video_coding_defines.h
@@ -59,7 +59,7 @@ class VCMPacketizationCallback {
  public:
   virtual int32_t SendData(uint8_t payloadType,
                            const EncodedImage& encoded_image,
-                           const RTPFragmentationHeader& fragmentationHeader,
+                           const RTPFragmentationHeader* fragmentationHeader,
                            const RTPVideoHeader* rtpVideoHdr) = 0;
 
   virtual void OnEncoderImplementationName(const char* implementation_name) {}