Revert of Completed the functionalities of SrtpTransport.

pc/rtptransportinternal.h

Index: pc/rtptransportinternal.h
diff --git a/pc/rtptransportinternal.h b/pc/rtptransportinternal.h
index e58961997bcc4377cdd0730c3e6d0caa1f3679c5..cd88b976f42949945cbe9582b7ce7035b56440e3 100644
--- a/pc/rtptransportinternal.h
+++ b/pc/rtptransportinternal.h
@@ -54,13 +54,10 @@ class RtpTransportInternal : public RtpTransportInterface,
 
   virtual bool IsWritable(bool rtcp) const = 0;
 
-  virtual bool SendRtpPacket(rtc::CopyOnWriteBuffer* packet,
-                             const rtc::PacketOptions& options,
-                             int flags) = 0;
-
-  virtual bool SendRtcpPacket(rtc::CopyOnWriteBuffer* packet,
-                              const rtc::PacketOptions& options,
-                              int flags) = 0;
+  virtual bool SendPacket(bool rtcp,
+                          rtc::CopyOnWriteBuffer* packet,
+                          const rtc::PacketOptions& options,
+                          int flags) = 0;
 
   virtual bool HandlesPayloadType(int payload_type) const = 0;