Add RTC_ prefix to contructormagic macros.

webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h

Index: webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
diff --git a/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h b/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
index 686b45a7420c9017aaa52bae83b7ac8a6af6cc3e..50d369ba35f397253201027ce39b374ee35c3a8c 100644
--- a/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
+++ b/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t.h
@@ -91,7 +91,7 @@ class AudioEncoderIsacT final : public AudioEncoder {
   // Timestamp of the previously encoded packet.
   uint32_t last_encoded_timestamp_;
 
-  DISALLOW_COPY_AND_ASSIGN(AudioEncoderIsacT);
+  RTC_DISALLOW_COPY_AND_ASSIGN(AudioEncoderIsacT);
 };
 
 template <typename T>
@@ -122,7 +122,7 @@ class AudioDecoderIsacT final : public AudioDecoder {
   LockedIsacBandwidthInfo* bwinfo_;
   int decoder_sample_rate_hz_;
 
-  DISALLOW_COPY_AND_ASSIGN(AudioDecoderIsacT);
+  RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderIsacT);
 };
 
 }  // namespace webrtc