Add prefix to codec name constants.

Bug: webrtc:8401
Change-Id: I8cd4685df3609e8b91a79b19789aadef484138d4
Reviewed-on: https://webrtc-review.googlesource.com/14140
Reviewed-by: Peter Hanspers <peterhanspers@webrtc.org>
Commit-Queue: Kári Helgason <kthelgason@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20390}
diff --git a/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm b/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm
index 2a49189..8886209 100644
--- a/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm
+++ b/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm
@@ -14,11 +14,11 @@
 #import "RTCVideoCodec+Private.h"
 #import "WebRTC/RTCVideoCodecFactory.h"
 
-NSString *const kVideoCodecVp8Name = @"VP8";
-NSString *const kVideoCodecVp9Name = @"VP9";
-NSString *const kVideoCodecH264Name = @"H264";
-NSString *const kLevel31ConstrainedHigh = @"640c1f";
-NSString *const kLevel31ConstrainedBaseline = @"42e01f";
+NSString *const kRTCVideoCodecVp8Name = @"VP8";
+NSString *const kRTCVideoCodecVp9Name = @"VP9";
+NSString *const kRTCVideoCodecH264Name = @"H264";
+NSString *const kRTCLevel31ConstrainedHigh = @"640c1f";
+NSString *const kRTCLevel31ConstrainedBaseline = @"42e01f";
 
 @implementation RTCVideoCodecInfo