Add VideoPacket struct for video packets. Refactor Decode interface to use it.

remoting/protocol/rtp_video_writer.cc

Index: remoting/protocol/rtp_video_writer.cc
diff --git a/remoting/protocol/rtp_video_writer.cc b/remoting/protocol/rtp_video_writer.cc
index 5bd1c80193e55191f20f35fe230ec5e729d4252c..1a7ead49d02cdc33b4f6be9fbd387e1a44579070 100644
--- a/remoting/protocol/rtp_video_writer.cc
+++ b/remoting/protocol/rtp_video_writer.cc
@@ -4,6 +4,7 @@
 
 #include "remoting/protocol/rtp_video_writer.h"
 
+#include "remoting/proto/video.pb.h"
 #include "remoting/protocol/session.h"
 #include "remoting/protocol/rtp_writer.h"
 
@@ -15,12 +16,11 @@ RtpVideoWriter::RtpVideoWriter() { }
 RtpVideoWriter::~RtpVideoWriter() { }
 
 void RtpVideoWriter::Init(protocol::Session* session) {
-  rtp_writer_.Init(session->video_rtp_channel(),
-                   session->video_rtcp_channel());
+  rtp_writer_.Init(session->video_rtp_channel(), session->video_rtcp_channel());
 }
 
 void RtpVideoWriter::SendPacket(const VideoPacket& packet) {
-  rtp_writer_.SendPacket(packet.data().data(), packet.data().length(),
+  rtp_writer_.SendPacket(packet.data().data(), packet.data().size(),
                          packet.timestamp());
 }