Revert of Cast:Adding cast_transport_config and cleaning up

media/cast/rtcp/test_rtcp_packet_builder.h

Index: media/cast/rtcp/test_rtcp_packet_builder.h
diff --git a/media/cast/rtcp/test_rtcp_packet_builder.h b/media/cast/rtcp/test_rtcp_packet_builder.h
index 3a34dc0a034cb6bd88c1b64e95a4deb2995ca062..9b63a37fa4aed9018f24bb5eb7000f722dc88622 100644
--- a/media/cast/rtcp/test_rtcp_packet_builder.h
+++ b/media/cast/rtcp/test_rtcp_packet_builder.h
@@ -86,7 +86,7 @@
                            uint16 event_timesamp_delta);
 
   const uint8* Packet();
-  int Length() { return kMaxIpPacketSize - big_endian_writer_.remaining(); }
+  int Length() { return kIpPacketSize - big_endian_writer_.remaining(); }
 
  private:
   void AddRtcpHeader(int payload, int format_or_count);
@@ -94,7 +94,7 @@
 
   // Where the length field of the current packet is.
   // Note: 0 is not a legal value, it is used for "uninitialized".
-  uint8 buffer_[kMaxIpPacketSize];
+  uint8 buffer_[kIpPacketSize];
   char* ptr_of_length_;
   net::BigEndianWriter big_endian_writer_;
 };