Move ACMCodecDB::ValidPayloadType to RentACodec

webrtc/modules/audio_coding/main/acm2/acm_codec_database.cc

Index: webrtc/modules/audio_coding/main/acm2/acm_codec_database.cc
diff --git a/webrtc/modules/audio_coding/main/acm2/acm_codec_database.cc b/webrtc/modules/audio_coding/main/acm2/acm_codec_database.cc
index 59bb233eef92cb77976471bff7b83f23a6c8a3f9..b69f5457c1343f201d992ff1cf7648b67bc0ab4a 100644
--- a/webrtc/modules/audio_coding/main/acm2/acm_codec_database.cc
+++ b/webrtc/modules/audio_coding/main/acm2/acm_codec_database.cc
@@ -244,7 +244,7 @@ int ACMCodecDB::CodecNumber(const CodecInst& codec_inst) {
   }
 
   // Checks the validity of payload type
-  if (!ValidPayloadType(codec_inst.pltype)) {
+  if (!RentACodec::IsPayloadTypeValid(codec_inst.pltype)) {
     return kInvalidPayloadtype;
   }
 
@@ -348,11 +348,6 @@ int ACMCodecDB::CodecFreq(int codec_id) {
   return i < db.size() ? db[i].plfreq : -1;
 }
 
-// Checks if the payload type is in the valid range.
-bool ACMCodecDB::ValidPayloadType(int payload_type) {
-  return (payload_type >= 0) && (payload_type <= 127);
-}
-
 }  // namespace acm2
 
 }  // namespace webrtc