Add RTC_ prefix to (D)CHECKs and related macros.

webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc

Index: webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc b/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
index 732772c9f7a32cf1dcc3944469771b79b5ef56e9..f9dc96e061f14904422ab184764781376ae88f02 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
@@ -1339,7 +1339,7 @@ void RTCPReceiver::TriggerCallbacksFromRTCPPacket(
     // report can generate several RTCP packets, based on number relayed/mixed
     // a send report block should go out to all receivers.
     if (_cbRtcpIntraFrameObserver) {
-      DCHECK(!receiver_only_);
+      RTC_DCHECK(!receiver_only_);
       if ((rtcpPacketInformation.rtcpPacketTypeFlags & kRtcpPli) ||
           (rtcpPacketInformation.rtcpPacketTypeFlags & kRtcpFir)) {
         if (rtcpPacketInformation.rtcpPacketTypeFlags & kRtcpPli) {
@@ -1361,7 +1361,7 @@ void RTCPReceiver::TriggerCallbacksFromRTCPPacket(
       }
     }
     if (_cbRtcpBandwidthObserver) {
-      DCHECK(!receiver_only_);
+      RTC_DCHECK(!receiver_only_);
       if (rtcpPacketInformation.rtcpPacketTypeFlags & kRtcpRemb) {
         LOG(LS_VERBOSE) << "Incoming REMB: "
                         << rtcpPacketInformation.receiverEstimatedMaxBitrate;