Cast:Adding cast_transport_config and cleaning up

media/cast/transport/rtp_sender/packet_storage/packet_storage.cc

Index: media/cast/transport/rtp_sender/packet_storage/packet_storage.cc
diff --git a/media/cast/transport/rtp_sender/packet_storage/packet_storage.cc b/media/cast/transport/rtp_sender/packet_storage/packet_storage.cc
index 7b9f8019b3f091a8300b55fada4733553099ee5b..7d6f62f952182fe49f991b8f7f20542a018ec111 100644
--- a/media/cast/transport/rtp_sender/packet_storage/packet_storage.cc
+++ b/media/cast/transport/rtp_sender/packet_storage/packet_storage.cc
@@ -21,11 +21,11 @@ typedef TimeToPacketMap::iterator TimeToPacketIterator;
 class StoredPacket {
  public:
   StoredPacket() {
-    packet_.reserve(kIpPacketSize);
+    packet_.reserve(kMaxIpPacketSize);
   }
 
   void Save(const Packet* packet) {
-    DCHECK_LT(packet->size(), kIpPacketSize) << "Invalid argument";
+    DCHECK_LT(packet->size(), kMaxIpPacketSize) << "Invalid argument";
     packet_.clear();
     packet_.insert(packet_.begin(), packet->begin(), packet->end());
   }