Replace const-reference with pointer in SendData.

webrtc/modules/video_coding/video_sender_unittest.cc

Index: webrtc/modules/video_coding/video_sender_unittest.cc
diff --git a/webrtc/modules/video_coding/video_sender_unittest.cc b/webrtc/modules/video_coding/video_sender_unittest.cc
index 767f4edc5d6cda47e3e3555243e9640ec3a2da14..7249797eff94dab03c48ca41919dd4814cbe238c 100644
--- a/webrtc/modules/video_coding/video_sender_unittest.cc
+++ b/webrtc/modules/video_coding/video_sender_unittest.cc
@@ -95,7 +95,7 @@ class PacketizationCallback : public VCMPacketizationCallback {
 
   int32_t SendData(uint8_t payload_type,
                    const EncodedImage& encoded_image,
-                   const RTPFragmentationHeader& fragmentation_header,
+                   const RTPFragmentationHeader* fragmentation_header,
                    const RTPVideoHeader* rtp_video_header) override {
     assert(rtp_video_header);
     frame_data_.push_back(FrameData(encoded_image._length, *rtp_video_header));