Replace RTC_DEPRECATED with ABSL_DEPRECATED

This remove webrtc-specific macro that has no reason to be webrtc specific
ABSL_DEPRECATED takes a message parameter encouraging to write text how class or function is deprecated.

Bug: webrtc:12484
Change-Id: I89f1398f91dacadc37f7db469dcd985e3724e444
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/208282
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33314}
diff --git a/api/rtp_transceiver_interface.h b/api/rtp_transceiver_interface.h
index 9b46846..4799c4b 100644
--- a/api/rtp_transceiver_interface.h
+++ b/api/rtp_transceiver_interface.h
@@ -14,6 +14,7 @@
 #include <string>
 #include <vector>
 
+#include "absl/base/attributes.h"
 #include "absl/types/optional.h"
 #include "api/array_view.h"
 #include "api/media_types.h"
@@ -111,8 +112,8 @@
   // https://w3c.github.io/webrtc-pc/#dom-rtcrtptransceiver-direction
   // TODO(hta): Deprecate SetDirection without error and rename
   // SetDirectionWithError to SetDirection, remove default implementations.
-  RTC_DEPRECATED virtual void SetDirection(
-      RtpTransceiverDirection new_direction);
+  ABSL_DEPRECATED("Use SetDirectionWithError instead")
+  virtual void SetDirection(RtpTransceiverDirection new_direction);
   virtual RTCError SetDirectionWithError(RtpTransceiverDirection new_direction);
 
   // The current_direction attribute indicates the current direction negotiated
@@ -140,7 +141,7 @@
   // This is an internal function, and is exposed for historical reasons.
   // https://w3c.github.io/webrtc-pc/#dfn-stop-the-rtcrtptransceiver
   virtual void StopInternal();
-  RTC_DEPRECATED virtual void Stop();
+  ABSL_DEPRECATED("Use StopStandard instead") virtual void Stop();
 
   // The SetCodecPreferences method overrides the default codec preferences used
   // by WebRTC for this transceiver.